Georgia200
Well-known member
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 instead of the C9ZZ isolators.
The C9ZZ 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.
The 250 engine bracket is beefer and mounts with 3 bolts instead of the 200s 2 bolt mount. This is probably better since the 250 is heavier and has more torque than a 200. Many have used the 200s 2 bolt mount without issue.
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 instead of the C9ZZ isolators.
The C9ZZ 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.
The 250 engine bracket is beefer and mounts with 3 bolts instead of the 200s 2 bolt mount. This is probably better since the 250 is heavier and has more torque than a 200. Many have used the 200s 2 bolt mount without issue.