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Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

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old28racer
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Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #1 by old28racer » Thu Jul 02, 2020 12:25 am

Trying to figure out what bolt pattern is that is drilled & taped into top of a Clifford 43-4502 240/300 inline 6 open chamber 4V intake manifold. I know that the holes are to bolt the carb adapter of choose on to. I have a used intake from a buddy on it's way but I would like to know what the bolt pattern spacing is, any one out there know? Thanks for looking.
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1986F150six
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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #2 by 1986F150six » Thu Jul 02, 2020 9:31 am

I did a search and found this on the H,A.M.B. site. Hope it is useful.

Gearheads,

I recently bought a clifford intake for my 235 engine, I also bought a used holley 390 carb. What kind of adapter do I have to use ....

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68caddydaddy, Oct 4, 2016
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saltflats
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from Missouri

What is the flange pattern on the intake?


68caddydaddy
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from The Netherlands

saltflats said: ↑
What is the flange pattern on the intake?
About 3.85" x 3.77" (98x96 mm)

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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #3 by CNC-Dude » Thu Jul 02, 2020 10:19 am

Some were originally made to fit the early WCF style carbs. They were smaller CFM's and ideal for inline engines.
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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #4 by bubba22349 » Thu Jul 02, 2020 11:29 am

Clifford intakes used their own proprietary design / spacing so that only their carb adapters would fit them, though it wouldn't be that hard to make your own adapter plate. :thumbup: :nod:
Even a bad day Drag Racing is still better than a good day at work!

Current project is a 1988 John Deere 420 Garden Tractor I need a few small parts to get it fixed, plus some cosmetic items, maybe a few attachments, if you happen to have or know of JD 420 parts would welcome the help!

My Ex-Inline 6 Fleet 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #5 by BigBlue94 » Thu Jul 02, 2020 7:00 pm

3&13/16" by 3&13/16" on centers

Hole is 3.5" square, with about 1/2" radii in the corners

Taken from an old paper gasket i made for my clifford, water heated, single "4bbl" open plenum manifold.
1985 Bronco. 309ci I6, NP435, 4.56 gears, Detroit locker and tru-trac, 4" lift, and 37" swamper tires. The 309 is 9.75:1 CR with a Schneider 140H cam, 4bbl, roller rockers, larger valves, and headers.

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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #6 by THE FRENCHTOWN FLYER » Thu Jul 02, 2020 10:28 pm

I have a couple of open carb adapters that look like Clifford - but they do not align by about 1/8". I think if I ever need them I'll mill them to fit. crazy
Last edited by THE FRENCHTOWN FLYER on Fri Jul 03, 2020 7:01 am, edited 2 times in total.
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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #7 by old28racer » Thu Jul 02, 2020 11:15 pm

I was finally able to get ahold Of Clifford Performance today. Tec guy said the bolt pattern in the intake is square 3 7/8" x 3 7/8". Will only fit their adapters. At $58 for one of their 4x2 adapters I think I will get another pc aluminum plate & build one.
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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #8 by THE FRENCHTOWN FLYER » Fri Jul 03, 2020 7:03 am

For a quick-n-dirty trial don't rule out the possibility of making one out of hardwood. It works for a test stand or a drag car, or even to try out a combo on a street ride, short term.
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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #9 by BigBlue94 » Fri Jul 03, 2020 11:23 am

old28racer wrote:I was finally able to get ahold Of Clifford Performance today. Tec guy said the bolt pattern in the intake is square 3 7/8" x 3 7/8". Will only fit their adapters. At $58 for one of their 4x2 adapters I think I will get another pc aluminum plate & build one.


Their adapters are nice. At least the one i have is. But yeah, bit on the pricey side.

The mounting pad before the adapter is rather small compared to a normal 4bbl manifold. I was using paper gaskets, but have since tried black RTV. We'll see how it holds up.

Image

Image
1985 Bronco. 309ci I6, NP435, 4.56 gears, Detroit locker and tru-trac, 4" lift, and 37" swamper tires. The 309 is 9.75:1 CR with a Schneider 140H cam, 4bbl, roller rockers, larger valves, and headers.

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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #10 by old28racer » Fri Jul 03, 2020 2:33 pm

FTF -- Ya a Pc hardwood would be a lot easier to mill just so I could test run it.

BigBlue94 -- I agree that their 4x2 adapter is a real nice, well make unit. I OK with building another aluminum adapter like I just finished, only takes time and I've got lots of that.
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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #11 by Firepower354 » Sat Jul 04, 2020 6:22 pm

BigBlue94 wrote:
old28racer wrote:I was finally able to get ahold Of Clifford Performance today. Tec guy said the bolt pattern in the intake is square 3 7/8" x 3 7/8". Will only fit their adapters. At $58 for one of their 4x2 adapters I think I will get another pc aluminum plate & build one.


Their adapters are nice. At least the one i have is. But yeah, bit on the pricey side.

The mounting pad before the adapter is rather small compared to a normal 4bbl manifold. I was using paper gaskets, but have since tried black RTV. We'll see how it holds up.

Image

Image



Threebond 1184, the current superseded number, is what I use on all my 2 stroke cases. They get heat, vibration, pos/neg pressure pulsing, gas and oil, and I've never had a leaker. It's thinner than the old stuff with asbestos, so I use flux brushes to apply. Stays a little flexible. Whetstone is the perfect prep, IMO
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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #12 by bubba22349 » Sat Jul 04, 2020 7:41 pm

:hmmm: In using an RTV on an intake around fuel my experance has been that it doesn't work for very long. I have been using Permatex non hardening for many years. :nod:
Even a bad day Drag Racing is still better than a good day at work!

Current project is a 1988 John Deere 420 Garden Tractor I need a few small parts to get it fixed, plus some cosmetic items, maybe a few attachments, if you happen to have or know of JD 420 parts would welcome the help!

My Ex-Inline 6 Fleet 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #13 by BigBlue94 » Sun Jul 05, 2020 3:05 pm

I should probably just cut out another paper gasket then. That seemed to work fine.
1985 Bronco. 309ci I6, NP435, 4.56 gears, Detroit locker and tru-trac, 4" lift, and 37" swamper tires. The 309 is 9.75:1 CR with a Schneider 140H cam, 4bbl, roller rockers, larger valves, and headers.

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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #14 by bubba22349 » Sun Jul 05, 2020 3:38 pm

Yes if the surfaces are nice an flat / true a good paper gasket is all you really need. :thumbup: :nod:
Even a bad day Drag Racing is still better than a good day at work!

Current project is a 1988 John Deere 420 Garden Tractor I need a few small parts to get it fixed, plus some cosmetic items, maybe a few attachments, if you happen to have or know of JD 420 parts would welcome the help!

My Ex-Inline 6 Fleet 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #15 by 1986F150six » Tue Jul 07, 2020 11:20 am

old28racer wrote:FTF -- Ya a Pc hardwood would be a lot easier to mill just so I could test run it.

BigBlue94 -- I agree that their 4x2 adapter is a real nice, well make unit. I OK with building another aluminum adapter like I just finished, only takes time and I've got lots of that.


Last night, I dug into my storage area to retrieve the NOS Clifford 2 X 4 intake manifold with two adapter plates for Motorcraft two barrel carburetors.

The adapter plate is identified as CLIFFORD A-0452

On the outer edges of the plate, with the CLIFFORD and A-0452 facing up, there are four slots which are for the mounting studs and nuts [which attach the plate to the intake manifold]. These slots are angled. Center to center of the long side of the rectangle, the measurement is 3 13/16". Center to center on the short side of the rectangle is 3 3/4". If measured as an "X", the center to center distance is 5 3/8".

There are eight threaded holes.

The outer most set, located on the "ears" of the adapter, measure 6 1/4" [center to center] as on an "X". The same set of threaded holes measures 3 1/2" [center to center] on the short side of the rectangle. On the long side of the rectangle, the outer threaded holes measure 5 3/16" [center to center].

The inner most set of threaded holes, measures 4 3/16" [center to center] as on an "X". The same set of threaded holes measures 1 13/16" [center to center] on the short side of the rectangle. On the long side of the rectangle, these inner threaded holes measure 3 5/8" [center to center].

Disclaimer: I am not a machinist, so the measurements are close, but not absolute. :wink:

If there is a particular question, please ask and I will try to find the answer.
Last edited by 1986F150six on Tue Jul 07, 2020 11:44 am, edited 1 time in total.

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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #16 by old28racer » Tue Jul 14, 2020 9:56 pm

Thanks to all for the help. I got the Clifford 4V intake my buddy passed forward to me along with the Clifford adapter. I installed a Mr Gasket 4x2 carb adapter that will except both my Holley 2300 & Autolite 2100 carbs. This setup will be mounted on my 1971 F250 300 4.9L motor. Will try both carbs & get AFR baselines for each. Pictures are of intake mounted on another 300 I am building.
Image
Image
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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #17 by 1986F150six » Wed Jul 15, 2020 2:11 pm

Looks nice! :thumbup:

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Re: Clifford 43-4502 4V 240/300 Intake Bolt Pattern ??????

Post #18 by old28racer » Wed Jul 15, 2020 7:38 pm

Thanks David, I hope it works better than my current 1x2 adapter setup on my F250 300 with my Holley 2300 2bbl carb. Will see what my new AFR baseline is.
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