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Discussion Starter #1
Posting this as a PSA, since the topic comes up several times a year. I think someone already figured this out, but I cant find any info on it.

This applies to 67-70 Mustangs. Im still working on 65-66. 71-73 Mustangs use the Torino platform and are different.

There are two mount issues when replacing a 200 with a 250 in a 67-70 Mustang. if you use a 200 mount, the engine sits to high and causes hood clearance issues. If you fabricate mounts that move the engine fore or aft, the transmission will not seat on its mount. Now the driveshaft will be the incorrect length.

The 69-70 250 specific engine mount is a three piece mount.

Frame bracket: C9ZA-6061 and 6037. Isolator: C9ZZ-6038 (A, B or C) Same p/n L and R. These are not reproduced, no dealer has any NOS, your only option is used. Engine bracket: AA

To mount a 250 in a 67-70 Mustang or replace worn isolators in a 69-70 250 Mustang use Anchor isolator 2265.

The C9AA p/n has 3 studs, one for the frame bracket, two for the engine bracket. The Anchor 2265 has only one stud for the engine bracket. This will require a new hole to be drilled in the engine bracket, but the engine will sit at the proper height and be positioned properly fore and aft for the transmission to sit in its mount. No driveshaft issues.
 

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Very interested to hear about 65-66. I kluged the mounts when I stuck the 250 in my 66. They work but I'm not really happy with them. I just found a set of 250 mounts and isolators thinking that maybe I could use the V8 mount I took out but that does not look too feasible at this point.
 

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Discussion Starter #3
I installed the frame brackets from 65, 67 and 69 in my 67.

The angle on the face of the mounting bracket is different on each mount. 2, 35 and 45 degrees.

The 65 brackets sit 3" higher than 69, the 67 brackets sit 2" higher than 69.

Your best bet is a set of Maverick frame brackets, anchor isolators and the 69 engine brackets.
 
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