250 Motor Mounts

I think those 250 isolators were only used in 69/70, not enough demand to repop them.

NOS are nearly impossible to find and when you do, be ready with a big fat check.
 
Georgia200":wvjv16so said:
I think those 250 isolators were only used in 69/70, not enough demand to repop them.

NOS are nearly impossible to find and when you do, be ready with a big fat check.

From 1971 to 1973 (ending year of the full size Mustang chassis) the 250 six was the only six offered in them. Since all these Mustangs had the same basic chassis (after their retooling) in 1967 through to 1973 it would be doubtful that the 1969 250 engine mounts were changed significantly in their design measurements for the remaining 1971 to 1973 models. Checking out the isolator part numbers for 1969 though 1973 would probably answer that question. Correction With rocklords below post this mystery has been answered the 1971 to 1973 chassis and the 250 mounts are very different from the 1969 to 70 250 mounts.

In any case you have 2/3 of the 1969 up engine mounts that you need to do a bolt in 250 swap that is factory looking into your 1967. If you can't find a set if you can get the basic measurements of those isolators it doesn't look like it would be all that hard to make up a set. Good luck (y) :nod: corrected info
 
bubba22349":1xq5l1d1 said:
From 1971 to 1973 (ending year of the full size Mustang chassis) the 250 six was the only six offered in them. Since all these Mustangs had the same basic chassis (after their retooling) in 1967 through to 1973 it would be doubtful that the 1969 250 engine mounts were changed significantly in their design measurements for the remaining 1971 to 1973 models. Checking out the isolator part numbers for 1969 though 1973 would probably answer that question. In any case you have 2/3 of the 1969 up engine mounts that you need to do a bolt in 250 swap that is factory looking into your 1967. If you can't find a set if you can get the basic measurements of those isolators it dosent look like it would be all that hard to make up a set. Good luck (y) :nod:

The 71-73 Mustang was based on the Torino platform, so the mounts are not the same as the 69-70.
I've attached pictures of the 250 mounts for comparison. Except for the engine brackets, the insulators and chassis brackets are completely different.
 

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  • 69 Mustang 250 Mounts 03.jpg
    69 Mustang 250 Mounts 03.jpg
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  • 71-71 Mustang 250 Mount Left 02.jpg
    71-71 Mustang 250 Mount Left 02.jpg
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  • 71-71 Mustang 250 Mounts 01.jpg
    71-71 Mustang 250 Mounts 01.jpg
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:unsure: that's interesting and thinking about it some more it makes perfect sense since the Falcons also went to the Fairlane / Torino chassis even before the Mustangs. Thanks for showing all those parts differences Rocklord :nod: (y)
 
In any event those isolators for the 3 bolt brackets are unobtainable, so buying those was a waste of money.

The Mustang frame brackets and Maverick block brackets and isolators look like they will work fine on my 67.

I hope so, I have over $150 in them.

Still waiting on the machine shop, derusted the axle and spent $200 on brakes today.
 
Nice day so I had the car out of storage for a quick cruise.

I compared the C9 frame mounts with my C7 mounts.

The C9 mounts are shorter and not as deep, it looks like the engine will sit back 1-2in.

Im wondering if the mount holes in the 250 block are in the same location as the 200 mount holes. If they are, thats going to be a problem, I cant shift the entire engine back 1-2in without changing everything else downstream of the engine.
 
Surfing ebay I found all six pieces of a 69 Mustang 250 motor mount BIN $40 + $12 shipping.

Seller said they had been on a shelf 30 years.

They showed up today and the rubber pieces look brand new.

Im not going to revel how much I have spent on motor mount pieces trying to figure out how Im going to install the 250, but its a lot.

Im tempted to shop around and see if I can find someone to repop them. There has to be a market for them.
 
Georgia200":10oed1de said:
Surfing ebay I found all six pieces of a 69 Mustang 250 motor mount BIN $40 + $12 shipping.

Seller said they had been on a shelf 30 years.

They showed up today and the rubber pieces look brand new.

Im not going to revel how much I have spent on motor mount pieces trying to figure out how Im going to install the 250, but its a lot.

Im tempted to shop around and see if I can find someone to repop them. There has to be a market for them.

It would be fairly easy to make an engine bracket and frame bracket from flat steel, the biggest hurdle would be the rubber mount.
A suggestion would be choose a 6 cylinder rubber mount readily available and inexpensive, like from the 67-68 Mustang or 250 Maverick, and build the brackets to accept them. You could even make the brackets adjustable, like they do for the V8, so they could be used in any of the 60-70 Falcons or Mustangs.

Some on the forum have looked into having the 69 Mustang 250 rubber mounts rebuilt, but it was very expensive. That's why I suggested using a rubber mount already available.

Just a thought.
 
When installing a 250 in a 67/68 using 69/70 frame brackets the problem is the unavailable rubber mount with the offset stud.

The 69/70 cars have the same problem when their rubber mount wears out.

The 69/70 engine frame bracket is narrower to accommodate the 250s wider block and its shorter, thats why the 69/70 uses the rubber mount with the offset stud to properly position the block fore and aft.

If you use a 65/66 or 67/68 rubber mount on a 69/70 frame bracket, the engine will sit to close to the firewall. The transmission will not line up with the cross member, the driveshaft will be to long and the shift linkage will not line up.

Until the 69/70 rubber mount is reproduced, I think the best solution is to modify the 69/70 3-bolt engine bracket to accept the 67/68 rubber mount. All that would take is a piece of flat steel welded over the 3-bolt bracket, then new mounting holes drilled.

I did some eye balling tonight on the mounts. Tomorrow I will get some pics, it actually looks pretty easy to mod the 67/68 rubber mount to fit the 69/70 bracket.
 
pic worth a thous...
 
I mocked up a set of 65/66 and 67/68 rubber mounts to compare them with the 69/70 mounts.

The 69/70 mounts offset the mounting stud that goes into the frame mounts 1.75 in.

So if the 69/70 frame mounts are installed and a 65/66 or 67/68 rubber mount is used, the engine will sit back 1.75 in from its original location.

As i stated above, that screws up the tranny mount, driveshaft and transmission linkage.

Im still looking for a set of 65/66 frame brackets. on a 67/68 those may work with the 65/66 rubber mounts to install a 250.
 
and back up is my welder...
I'm just bout thru collectin OEM towers'n mounts.
We'll (will) C in 30 days...
 
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