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Possible to use Mustang leaves on Falcon?

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CoupeBoy
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Possible to use Mustang leaves on Falcon?

Post #1 by CoupeBoy » Tue Feb 16, 2010 2:56 pm

I was thumbing through the Falcon Pictures SCC has posted and got a brain fart.
"How nice would it be if I could use Mustang Leaf Springs on Dad's Falcon when I rebuild it?"

From looking at the pictures, there really isn't much "substance" to the front mount, so it probably wouldn't be that terrible if it were widened 1/2" or so. (picture torching out the old and making a new one out of similar sized thickness metal). The rear of Falcons (according to the pictures) looks like it is bolted onto the bottom of the unibody 'framerail'. So being the redneck that I am I was thinking that cutting an eyelet (and part of the main leaf) off of an existing 2.5" wide spring and then drilling it for bolt holes, I would have a bolt on solution to the rear.

I've been half heartedly monitoring threads on here where people are in search of a good spring manufacturer for Falcons, and it looks like supplies come and go, my idea is to modify once and get a 'more popular' spring forever.

Is this crazy thinking?
-ron

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Re: Possible to use Mustang leaves on Falcon?

Post #2 by FalconSedanDelivery » Tue Feb 16, 2010 3:32 pm

I like your thinking, And yes it can be done , takes 3 things , Time , Money , and Talent, Ive modified every thing I've owned in order to upgrade and keep maintanence easy and
inexpensive ,so I say go to it
Falcon 6's, FE's I Like them both , Sold all My 6 cyl stuff ( for now at least ) glad to pass along some tips though

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Re: Possible to use Mustang leaves on Falcon?

Post #3 by CoupeBoy » Tue Feb 16, 2010 5:01 pm

I thought about trying to find a way to 'taper' the ends of the Mustang springs to be the same width as the Falcon ones, then using stock Falcon bushings... but then any replacement springs would require the same modification, plus I don't know how structurally sound it would be.

-ron

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Re: Possible to use Mustang leaves on Falcon?

Post #4 by FalconSedanDelivery » Tue Feb 16, 2010 5:54 pm

Definetly better to make the mounts for the springs then modifiey them , and while your at it move them inboard for more tire clerance
Falcon 6's, FE's I Like them both , Sold all My 6 cyl stuff ( for now at least ) glad to pass along some tips though

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Re: Possible to use Mustang leaves on Falcon?

Post #5 by CoupeBoy » Tue Feb 16, 2010 6:29 pm

I'll have to review the diagrams at home to see how that would affect the 'splay' of the leaves, they (leaf springs) are normally wider at the rear then the front. I might have to move the whole assembly inboard the same amount front and rear. My next concern would be, is there enough room at the shackle to move them in? Isn't there a gas tank back there?

-ron

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Re: Possible to use Mustang leaves on Falcon?

Post #6 by rbohm » Tue Feb 16, 2010 10:05 pm

8) when i looked at my interchange manual a few years ago, i found the 63-65 falcon springs and 65-66 mustang springs were the same width and length. unfortunately the arch specs were not listed. and by the way the axle location pin is also in the same place. i havent yet tried swapping the springs yet to be sure though.
64 falcon
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Re: Possible to use Mustang leaves on Falcon?

Post #7 by SoCar72 » Thu Apr 08, 2010 7:01 am

I'm considering taking a stab at this. I really want to replace the original leafs on my '63. I spec'd out my '69 Mustang leafs and found that the front arc (eye to leaf pin) was the same as my '63, But as you know the width's are different by 1/2". But looking at the narrower Falcon leafs, it sure looks like that with some reshaping of the bushings, the later (wider) springs could be fitted without cutting / welding. However, my plan fell short when I measured the rear arc, the '69 is too long to adapt. :(

RBOHM's post mostly answers the "early Mustang to round body Falcon" swap question. I suspect that the arch should be close enough with any difference being negligible. I can't image Ford would design 2 rear clips so close in architecture and so close in years without taking advantage of (at the time) already-in-production parts. As I once read on this forum somewhere, "The Mustang is the second cheapest car Ford produced during this time."

I swapped leafs on my '69 a few years back as well as my '92 F-150. In both cases, the new spring archs didn't even remotely match the old ones when laid together. Both cases raised the vehicle, but both cases also involved stiffer springs. Other than extreme cases, I'm wondering just how much of a difference this can really make if you're using similar number of leafs and eye position. Besides, it seems like any unwanted change in ride height could be adjusted up/down accordingly with shackle or block adjustments. Which is why I'm (now more) considering "Mustang" leafs vs. "Falcon" leafs.

My direct Mustang experience is with my '69 and Falcon my '63. Could there be something critical that I'm missing between the earlier Mustangs and Falcons?
'63 Falcon 4dr, 170 stock, 3.20:1 7.25"
T5 ('85 Mustang 5.0) 3.35 1st - 0.68 5th, 25mpg city / 27mpg hwy
Pertronix Ignitor II & Coil, 16x7 Cragar 345's re-bored for 4-lug, 215/60 R16 BFG's

'69 Mach 1, 351w modified, 4sp Top Load, 3.00 9", Torq-Thrust II's 17x8f, 17x9.5r, 245/45f, 275/40r
'79 F-250 2wd, 300, Offy with 470 Holley T/A, Hedman Long Tubes, 4sp OD MT, 3.40 Dana 60

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Re: Possible to use Mustang leaves on Falcon?

Post #8 by SoCar72 » Fri Apr 30, 2010 3:38 pm

I was just looking online, and 2 different sources (Eaton Springs and Mustangs Plus) list all early Mustangs (65-73) as "interchangable" rear leafs. Indicating, other than eye location and number of leafs, that all 1st gen Mustangs share the same widths, lengths, and pin orientations.

Given that info, is there something odd in the interchange during the 65-66 Mustang. Citing RBOHM's info :

rbohm wrote:8) when i looked at my interchange manual a few years ago, i found the 63-65 falcon springs and 65-66 mustang springs were the same width and length. unfortunately the arch specs were not listed. and by the way the axle location pin is also in the same place. i havent yet tried swapping the springs yet to be sure though.


Which brings me back to my '69 Mustang's springs. The rear length (pin to rear eye) is about 3.5" longer than my '63 Falcon's, which puts the rear eye beyond a useful range for swapping, as my rear shackle is already pointing rearward toward the rear eye.

Dearborn Classics lists the same part number for 60-70 Falcons. Did Ford change up the rear clip to share the Mustang's architecture for the '64-up models but retained the 2" width? If so, then their PN is a blanket number that is suffixed for specific design. If the same lengths were used for all Falcons (60-70), then the rear Mustang length will be too long to swap into a Falcon, unless the rear frame mount got moved back after '63).

For reference : (tape measure and eyeball, +/- 1/4")
'69 Mustang - 2.5" wide x 22.25" front arc x 31.5" rear arc
'63 Falcon - 2" wide x 22.25" front arc x 28" rear arc
'63 Falcon 4dr, 170 stock, 3.20:1 7.25"
T5 ('85 Mustang 5.0) 3.35 1st - 0.68 5th, 25mpg city / 27mpg hwy
Pertronix Ignitor II & Coil, 16x7 Cragar 345's re-bored for 4-lug, 215/60 R16 BFG's

'69 Mach 1, 351w modified, 4sp Top Load, 3.00 9", Torq-Thrust II's 17x8f, 17x9.5r, 245/45f, 275/40r
'79 F-250 2wd, 300, Offy with 470 Holley T/A, Hedman Long Tubes, 4sp OD MT, 3.40 Dana 60

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Re: Possible to use Mustang leaves on Falcon?

Post #9 by SoCar72 » Tue May 18, 2010 9:05 pm

CoupeBoy, I did some math comparing spring rates using a formula from Herb Adams Chassis Engineering book.

(width x number of leaves / 12) x ([1000 x thickness] / overall length) 3rd power = spring rate in pounds per inch of travel

Comparing the early Falcon springs (narrower and shorter) and the Mustang springs (wider and longer), the 2 springs are within about 2 lbs-in of each other, 1%, assuming both are 5 leaf. Other than "Mustang springs on a Falcon", there appears to be no discernible benefit to swapping them in.

I'm going to recant my stab at trying this, which does appear to be possible with only relocating the rear shackle to accommodate the long leaf.

One advantage with retaining the narrow springs is the possibility of offsetting the bushings to the interior which would allow the spring to be pulled inboard by about 1/4" inch for a little more wheel/tire clearance. Which should allow a 17x8 wheel with 5.25" backspace and a 245/50 tire to clear, assuming minimal or no side deflection of the suspension. :mrgreen:
'63 Falcon 4dr, 170 stock, 3.20:1 7.25"
T5 ('85 Mustang 5.0) 3.35 1st - 0.68 5th, 25mpg city / 27mpg hwy
Pertronix Ignitor II & Coil, 16x7 Cragar 345's re-bored for 4-lug, 215/60 R16 BFG's

'69 Mach 1, 351w modified, 4sp Top Load, 3.00 9", Torq-Thrust II's 17x8f, 17x9.5r, 245/45f, 275/40r
'79 F-250 2wd, 300, Offy with 470 Holley T/A, Hedman Long Tubes, 4sp OD MT, 3.40 Dana 60

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Re: Possible to use Mustang leaves on Falcon?

Post #10 by CoupeBoy » Tue May 18, 2010 11:37 pm

My only real goal was to find a reliable easy to find replacement spring, not make any real performance gains. Plus on the car I would use this on I don't need to go crazy with wheel sizing.. 205/70r15 would do just fine. (ok, maybe a 16" of similar dimensions)

-ron

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Re: Possible to use Mustang leaves on Falcon?

Post #11 by SoCar72 » Thu May 20, 2010 7:22 pm

Dearborn Classics has about the cheapest leafs I've found, less than $300 for a pair and you can choose 3, 4, or 5 leafs as well as option for mid or reverse rear eyes.
'63 Falcon 4dr, 170 stock, 3.20:1 7.25"
T5 ('85 Mustang 5.0) 3.35 1st - 0.68 5th, 25mpg city / 27mpg hwy
Pertronix Ignitor II & Coil, 16x7 Cragar 345's re-bored for 4-lug, 215/60 R16 BFG's

'69 Mach 1, 351w modified, 4sp Top Load, 3.00 9", Torq-Thrust II's 17x8f, 17x9.5r, 245/45f, 275/40r
'79 F-250 2wd, 300, Offy with 470 Holley T/A, Hedman Long Tubes, 4sp OD MT, 3.40 Dana 60

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Re: Possible to use Mustang leaves on Falcon?

Post #12 by '68falconohio » Sun May 23, 2010 5:26 pm

Dearborn Classics wants $400 for a pair of 3,4,or 5 leafed springs for my '68 Falcon(similar part to Torino/Fairlane). Another supplier, McVeigh's, is ringing in $130 cheaper but only offering a 4 leafer. I have a query in with Dearborn Classics about alt. eye locations because they aren't listed on the site. Oh yeah, 15-20 business days lead-time reqd from Dearborn. :?
'68 Falcon - sold
'99 F-250 Super Duty, '64 Lincoln SA-200 "Redface" - weldin' car
'04 F-350 Super Duty - racecar

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Re: Possible to use Mustang leaves on Falcon?

Post #13 by CoupeBoy » Mon May 24, 2010 4:32 pm

And a completely blind google search turns up 1968 Mustang leaves for right around $100 each
[url=http://www.superiormustangparts.com/Mustang-leaf-springs.asp]Our Best Selling Mustang Leaf Springs
[/url] (or $200 per pair)

So if the conversion from Falcon leaves to Mustang leaves can be done for a reasonable price (say under $200) you would break even the first time. And if you didn't like the ride height/quality you would start seeing savings from the conversion on the second set of leaves..

SoCar72, if you get this figured out I'd be infinitely interested in either the write-up or if you end up making a set of front mounts, buying a set for my Dad's 63 Falcon Convertible..

-ron

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Re: Possible to use Mustang leaves on Falcon?

Post #14 by SoCar72 » Thu May 27, 2010 8:32 pm

Dearborn's price has jumped considerably. '63 Falcon 5-leaf Std eye in my print catalog 2009 were $247.95 for a pair.

TheSuspensionKing.com
http://thesuspensionking.com/catalog/product_info.php?cPath=21_22_99_142&products_id=335&osCsid=7ugrfpqa8urq4757jcthkmpkc2
5 leaf Std Eye, minus bushings $104.00

I'll look further into this...
'63 Falcon 4dr, 170 stock, 3.20:1 7.25"
T5 ('85 Mustang 5.0) 3.35 1st - 0.68 5th, 25mpg city / 27mpg hwy
Pertronix Ignitor II & Coil, 16x7 Cragar 345's re-bored for 4-lug, 215/60 R16 BFG's

'69 Mach 1, 351w modified, 4sp Top Load, 3.00 9", Torq-Thrust II's 17x8f, 17x9.5r, 245/45f, 275/40r
'79 F-250 2wd, 300, Offy with 470 Holley T/A, Hedman Long Tubes, 4sp OD MT, 3.40 Dana 60

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Re: Possible to use Mustang leaves on Falcon?

Post #15 by Ranchero63 » Wed Jun 02, 2010 10:34 pm

I have a '63 Ranchero, which a few years ago needed new leafs. Hard to come by at the time and way too expensive. I lucked out and when the local u-pull-it yard had a '63 Ranchero with almost new leafs, which I scored for $60 pr. I also got a full quarter panel which I removed by myself with chisels and hacksaws (no power tools allowed).

Anyways, the springs were 2 inches wide, but instead of the split bushing like on 60-63 they had steel inner and outer bushing like 64-65.

60-63
Image

64-65
Image

Apparently, there is another unique bushing for the 63 convertible similar to the 64-65 style. I haven't seen it first hand, but it may actually be what is in the front of my springs.

You can see that the bolts between the two styles have different diameters. The cups that came off the the parts truck (and may actually be 63 conv.) have the same size inner hole as the 64-65 mounting bolt. But they were rusted through, so I couldn't use them at the time, (this was a Sunday, I drove it 30 miles to work, the thing had to go back together that day so I could get home, etc.)

So, I had to use my original cups and bolts that corresponded with each other. I took my original 60-63 bolt and turned down the diameter after it passed the cup so that it could go through the smaller hole in the bushing.

At the time, I didn't know about the '63 conv. differences (still don't know for sure). So it appeared to me that the bushing that was in my new to me leafs was the same as 64-65 Falcon. I assumed this because the width of the outer shell of the bushing stuck out passed the sides of the 2 inch wide spring considerably. I didn't measure the width of the bushing in my new ranchero leafs and compare them to the ones in my 64.

If they are the same width, then a 2.5 inch wide spring can be used in a 60-63 falcon using the modified bolt method, as I did. Both my cars are in different places at the moment, so I can't take any measurements to confirm whether this will work or not.
Chris Pruner

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'64 Falcon 2 dr Sedan 200 Turbo T5 (project)

http://www.myspace.com/kustom63
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http://www.flushstance.com

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Re: Possible to use Mustang leaves on Falcon?

Post #16 by SoCar72 » Sat Aug 07, 2010 5:05 pm

Been doing some more research and brain stormin'... Assuming that the bushing differences, as illustrated by Ranchero63, do not pose a real problem for mounting the front eye, there would be one noticeable improvement with installing Mustang leafs on a Falcon that didn't occur to me until just recently.

With the 2.5" Mustang leafs being a 1/2" wider, the leaf provides less lateral deflection across the bushings than the 2" Falcon springs. This would only be noticeable in hard turns when the body is most likely to shift laterally across the rear end as the bushings, all 3 sets, deflect due to the cornering load. That extra 1/2" will decrease bushing deflection by 25% at each point. Though the increase is spring rate will barely be noticeable, when comparing equal numbers of leaves, the cornering stability will. It may be enough to lessen the need for that Panhard bar that you've been talking about.

It would also be worthwhile to invest the little extra to get the mid or reverse eye option on the new leafs. When I put new ones on my Mustang, I opted for the mid-eye. I found that laterally stability increased considerably, due to that the rear eye's leverage on the shackle shortened by about 1.5", thus inducing less bushing deflection. Rear sway is so unnoticeable, that I do not see a street need for a Panhard bar or Watts link. If I were track racing, I'd reconsider.

I'm sure the fresh bushings had a hand in the equation as well, but the geometry and mechanics of the system are undeniable. Without a durometer gauge, the old bushing looks just as usable as the new ones, showing no signs of real fatigue. Leaving me to conclude that most of the increase in stability is due to the eye location.

My Falcon's rear suspension needs some attention. When I swap leafs, I'll definitely try the Mustang option. I may take the mid-eyes out of the Mustang and install them in the Falcon while putting reverse eyes in the Mustang : I do want to lower the rear a little further.
'63 Falcon 4dr, 170 stock, 3.20:1 7.25"
T5 ('85 Mustang 5.0) 3.35 1st - 0.68 5th, 25mpg city / 27mpg hwy
Pertronix Ignitor II & Coil, 16x7 Cragar 345's re-bored for 4-lug, 215/60 R16 BFG's

'69 Mach 1, 351w modified, 4sp Top Load, 3.00 9", Torq-Thrust II's 17x8f, 17x9.5r, 245/45f, 275/40r
'79 F-250 2wd, 300, Offy with 470 Holley T/A, Hedman Long Tubes, 4sp OD MT, 3.40 Dana 60

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Re: Possible to use Mustang leaves on Falcon?

Post #17 by stevexysupersix » Sat Aug 07, 2010 5:52 pm

SoCar72 wrote:that I do not see a street need for a Panhard bar or Watts link. If I were track racing, I'd reconsider.


Clarification pls on panhard bar? Is that the same as what I'd know as a sway bar?
Cheers, Steve
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Re: Possible to use Mustang leaves on Falcon?

Post #18 by rbohm » Sun Aug 08, 2010 7:06 pm

stevexysupersix wrote:
SoCar72 wrote:that I do not see a street need for a Panhard bar or Watts link. If I were track racing, I'd reconsider.


Clarification pls on panhard bar? Is that the same as what I'd know as a sway bar?


8) no, the sway bar, properly called an antiroll bar, does not locate the rear axle, where as a panhard bar or watts link does.
64 falcon
66 mustang
05 grand marquis

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careening through a cosmic vapor
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Re: Possible to use Mustang leaves on Falcon?

Post #19 by stevexysupersix » Sun Aug 08, 2010 7:46 pm

Thanks
Cheers, Steve
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Re: Possible to use Mustang leaves on Falcon?

Post #20 by CoupeBoy » Mon Aug 09, 2010 1:20 pm

Oh, there's some good thinking! FWIW, a couple weekends ago Dad and my brother drug the Falcon out of storage, I've only seen a few crappy cellphone pics so far. They got curious to start it. The took the fuel line loose from the tank and put it into a gas can. Then Dad filed the points, checked the oil, dumped some gas down the carb and started it. I have never heard it run, and it hasn't been started since '89 when it was put in that building. He said it ran with a couple noisy lifters for about 5-10 minutes and then they 'pumped up' and it ran smooth. No fuel leaks from the fuel pump or the carb (that they could see). And the power top still works! The car is a bit more dented then I remember but there is no visible rust on it. They were going to recheck the floor pans.

If anybody wants to link this the thumbnail I'd appreciate it.
http://i689.photobucket.com/albums/vv256/phl3gm/07-24-10_1526.jpg

I talked to Dad about it and he's being 'reasonable', no restoration just repair and make it pretty. He specified 'single stage paint' because he is 'tired of dealing with clear coat'. He makes me laugh some days.

I'm getting closer to needing you to figure this out for me :lol: keep up the good work.

-ron

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Re: Possible to use Mustang leaves on Falcon?

Post #21 by SoCar72 » Thu Aug 19, 2010 7:52 pm

CoupeBoy wrote:I'm getting closer to needing you to figure this out for me :lol: keep up the good work.

:hmmm: Oh, I see how this works. I bust my knuckles so your work is easier.

I'm hoping to get into this before the winter. We'll see how life and finances treat me. When (if) I get it completed, I'll post my findings. I need to stop thinking and start doing...

"Dad's Falcon" : Rip van Winkle awakes from a 21 year snooze. :shock: :beer:
The photo link didn't open for whatever reason.


stevexysupersix wrote:Clarification pls on panhard bar? Is that the same as what I'd know as a sway bar?

Expanding on Rbohm...the Sway Bar, a misnomer since it should be called an Anti-Roll Bar (seconding Rbohm), only helps to control how far the car rolls laterally due to cornering forces by linking each suspension side by (basically) a double ended torque arm. This member does nothing for lateral shift only body roll.

A Panhard Bar acts like a long control arm by linking one side of the rear suspension to other side frame using pivots at each end. The PB doesn't restrict nor dampen suspension travel, only prevents the rear axle from shifting laterally as the car corners. The only down side is that the PB induces an arc travel as the suspension goes from full compress to full extension, meaning that you will feel a slight lateral shift in the rear end when you travel over dippy roads. The trick is to set the bar a perfectly level at the most common ride height, and make the PH as long as possible which will minimize the shift, as a short bar means more lateral shift due to a shorter swing radius. Assuming you have a 48" PB and your suspension travels 4" from neutral, your lateral shift would be about 1/3" toward the frame point.

Wikipedia offers a brief description of it along with a factory installation photo.
'63 Falcon 4dr, 170 stock, 3.20:1 7.25"
T5 ('85 Mustang 5.0) 3.35 1st - 0.68 5th, 25mpg city / 27mpg hwy
Pertronix Ignitor II & Coil, 16x7 Cragar 345's re-bored for 4-lug, 215/60 R16 BFG's

'69 Mach 1, 351w modified, 4sp Top Load, 3.00 9", Torq-Thrust II's 17x8f, 17x9.5r, 245/45f, 275/40r
'79 F-250 2wd, 300, Offy with 470 Holley T/A, Hedman Long Tubes, 4sp OD MT, 3.40 Dana 60

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Re: Possible to use Mustang leaves on Falcon?

Post #22 by CoupeBoy » Fri Aug 20, 2010 10:00 am

I can't believe you just figured out that I'm a technology leach.. I thought that I was more transparent than that.. wife and kids keep eating up my free time I don't get time to play with my cars much. Last night for example got home at 6, ate, put the kids through the bath, read the big one a book, assembled my daughters 'Power Wheels Gator' and then put the horses back into the corral. By that time it's 10:30p, which is the perfect time to get the boy (he's 4.5months old) a bottle and then off to bed (around 11p) only to have him wake up again at 12:15p. It has pretty much been similar to this since he was born on 4/1/2010 (that kid is such a jokester). And before this winter any of my free time is going to be spent performing repairs on my IH856 replacing the PTO with a dual speed one, then applying (rattle can) paint to all of the 'ugly' spots. And follow that with re-viving my 1952 CoOp E4 (which may be a Cockshutt 40), which I need to get the motor unstuck on, then re-route the hydraulic pump to someplace other than the PTO and build or buy a 3pt for it so I have a spare tractor. Last winter I only needed one and I didn't have any 3pt mounted snowblowers, so the neighbors let me borrow their JD4020, but they are moving this year and I will not be able to borrow their equipment anymore so I have to become more self reliant. No time for Falcon engineering...

The picture of the rip van falcon didn't work because I moved it. When I first posted that link it was in the root of my photobucket account and my root/default folder started getting full so I created sub directories under the automotive folder for the falcon and my mustang. Work firewalls preclude me from being able to actually SEE photobucket so I cannot correct it at this time without a healthy dose of blind faith, but I'm too tired for that this morning. I'll try to sneak over to starbucks over lunch and create a working link.

I look forward to your ongoing progress.

you may or may not find this useful but yesterday I was looking for subframe connectors for my '68 Mustang (just to get prices), on the Crites Restoration webpage under the 65-73 Mustang subpage,scroll down a ways they have a kit called.
1965-66 Mustang spring relocation kit -$149 gives you 3" on each side more clearance.

-ron

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Re: Possible to use Mustang leaves on Falcon?

Post #23 by SoCar72 » Fri Aug 20, 2010 6:17 pm

Sounds like a full plate, when do you sleep?

I've heard of those type of spring offset kits, they basically relocate the spring in board of the frame rail. They claim 3" of additional inboard wheel clearance, but that only relates to the spring, not the frame rail and unibody construction that follows it. The scariest thing is the rear shackles, they only offer half the structure that a factory style shackle does. :shock: :shock:

As it stands now, the leaf springs only slightly reduce inboard clearance in comparison to the frame/body. Considering lateral shift, the wheel and spring relationship is pretty well fixed, the frame/body and wheel relationship is variable. Relocating the springs inboard 3" will increase body roll, add additional cantilever stress between the hub and spring as well as spring and differential, and lastly will increase fore/aft stresses on the differential housing resulting from acceleration and braking. Ultimately, I can't think of a single benefit with such a kit. If you're building a tubbed drag racer, you'd replace the rear clip anyway and more than likely you're not using a small 6 as a powerplant, nor leaf springs for that matter...

Interesting to see such a kit, but I'd stay away from it. However, I do believe it is possible to install 2.5" leaves without reducing the spring-wheel clearance by 1/4", as would be the case if you just simply installed them, ignoring the rear shackle location problem.

Assuming something else doesn't become a higher priority: Mustang needs new rear tires before the Falcon gets new leafs. That is after the house necessities, new brakes on my truck,... :bang:
'63 Falcon 4dr, 170 stock, 3.20:1 7.25"
T5 ('85 Mustang 5.0) 3.35 1st - 0.68 5th, 25mpg city / 27mpg hwy
Pertronix Ignitor II & Coil, 16x7 Cragar 345's re-bored for 4-lug, 215/60 R16 BFG's

'69 Mach 1, 351w modified, 4sp Top Load, 3.00 9", Torq-Thrust II's 17x8f, 17x9.5r, 245/45f, 275/40r
'79 F-250 2wd, 300, Offy with 470 Holley T/A, Hedman Long Tubes, 4sp OD MT, 3.40 Dana 60

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Re: Possible to use Mustang leaves on Falcon?

Post #24 by CoupeBoy » Fri Aug 20, 2010 6:46 pm

sleep? Is that like the mythical 'free time' that I hear people talking about?

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Re: Possible to use Mustang leaves on Falcon?

Post #25 by CoupeBoy » Sun Aug 22, 2010 5:37 am

just up withe the boy at 4:30a.. replying via phone and the mobile photobucket doesn't provide clickable thumbnails, the original image exceeds height/width restrictions. So here's a direct url.
http://i689.photobucket.com/albums/vv256/phl3gm/automotive/1963%20Falcon%20Convertible/07-24-10_1526.jpg
-ron

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Re: Possible to use Mustang leaves on Falcon?

Post #26 by SoCar72 » Sat Aug 28, 2010 9:27 pm

Other than long-term storage gunk, it looks pretty good. This is the Falcon you're considering the "Mustang Leafs" for, isn't it?
'63 Falcon 4dr, 170 stock, 3.20:1 7.25"
T5 ('85 Mustang 5.0) 3.35 1st - 0.68 5th, 25mpg city / 27mpg hwy
Pertronix Ignitor II & Coil, 16x7 Cragar 345's re-bored for 4-lug, 215/60 R16 BFG's

'69 Mach 1, 351w modified, 4sp Top Load, 3.00 9", Torq-Thrust II's 17x8f, 17x9.5r, 245/45f, 275/40r
'79 F-250 2wd, 300, Offy with 470 Holley T/A, Hedman Long Tubes, 4sp OD MT, 3.40 Dana 60

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Re: Possible to use Mustang leaves on Falcon?

Post #27 by SoCar72 » Sat Aug 28, 2010 11:20 pm

rbohm wrote:8) when i looked at my interchange manual a few years ago, i found the 63-65 falcon springs and 65-66 mustang springs were the same width and length. unfortunately the arch specs were not listed. and by the way the axle location pin is also in the same place. i havent yet tried swapping the springs yet to be sure though.


Rbohm - I've been doing some more research on this. I haven't found anything on a 2" wide Mustang leaf, nor a 2.5" Falcon leaf before '64. I suspect your source indicates that the 2 are physically interchangeable, but not exact matches. I'm wondering if your source was implying that the bushings were the same width, not necessarily the leafs. Or, could it be referencing a hipo Falcon suspension package and early 6-cyl Mustangs. My research is indicating that '64-'65 Falcons and '64-'66 Mustangs shared the same specs (22" front x 31" rear x 2.5"wide). '66-up Falcons grew to 23" x 32" and '67-up Mustangs shifted 1/8" forward to 21 7/8" x 31 1/8". '60-'63 Falcons and Comets shared 22" x 28" x 2" springs. From '64-on, the Comets split completely from both the Falcon and Mustang specs.

Incidentally, I found this supplier of leaf springs who lists their build specs with the application.
http://www.generalspringkc.com/index.php?p=catalog&parent=98&pg=1
'63 Falcon 4dr, 170 stock, 3.20:1 7.25"
T5 ('85 Mustang 5.0) 3.35 1st - 0.68 5th, 25mpg city / 27mpg hwy
Pertronix Ignitor II & Coil, 16x7 Cragar 345's re-bored for 4-lug, 215/60 R16 BFG's

'69 Mach 1, 351w modified, 4sp Top Load, 3.00 9", Torq-Thrust II's 17x8f, 17x9.5r, 245/45f, 275/40r
'79 F-250 2wd, 300, Offy with 470 Holley T/A, Hedman Long Tubes, 4sp OD MT, 3.40 Dana 60

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Re: Possible to use Mustang leaves on Falcon?

Post #28 by CoupeBoy » Sun Aug 29, 2010 4:17 am

yep that is the one. I hope to upgrade as much as possible from Falcon specific to Mustang (easy to find). I will be heading to to the farm when the sun comes up with a better digital camera.

I replied around 9:30p but I don't see my message, lucky for me 'little guy' woke me up now (3-3:30a) so I could re-reply :)

-ron

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Re: Possible to use Mustang leaves on Falcon?

Post #29 by 64 200 ranchero » Sun May 19, 2019 4:42 am

I'm in the process of doing this to my 60 ranchero. It appears that the front leaf spring mount is about 3" wide. I like the idea of trimming down the bushing a little to compensate for the 1/2" difference. It seems like it would work. I have also found that leaf spring hangers from a Jeep are 2 1/2" wide and can be made to work with mustang shackles.
60 ford ranchero daily driver. 200 tri power, modified c4 trans, ds2 distributor, msd programable 6al2, weber ict's, 8" rear end with full spool, 3.80 gears, 245 tires, CI dual out header, Dynomax muffler, 114hp shot wet nitrous kit. JE Forged pistons, 280 110lc cam, around 11-1 compression.

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