I did a trial fit of a 390 block into my 57 Custom. I used the 272 Y-Block motor mounts and the motor sits in the car fine. I also used the 57 272 Z-Bar and mounting brackets that were in my car. The Z-bar mounting bracket stud on the motor side seems to be about an inch too far forward making the Z-Bar lilt toward the front on the motor side. Also the Y-Block Z-Bar lower arm seems a little too close to the block, but it may be because of the missalignment. Should the Y-block parts work with the FE (60s 390) or do I need 58 clutch linkage parts? Thanks!
There are some FE conversion mounts on ebay for sale, look under 58 Ford!!
John
You have to turn the Y block mounts backwards when installed on an FE to get it in the right position.
Motor mount opening faces the rear.