Hoping someone on the forum can help - I just recently acquired a 1975 Regal that has had a 455 transplant. This was a 350 car, and I am pretty sure that the swap was done using the existing 350 frame mounts since the engine doesn't set level visually. I know the factory 73-74 Century/Regal big block mounts are rare, is there any known source on reproduction frame mounts for a 455? Is there a factory mount off another Buick that will work/can be modified to work? I also plan on swapping a Turbo 400 for the current Turbo 350 - will a transmission crossmember from any 73-77 A body with a Turbo 400 work? How about the driveshaft - can I just replace the yoke or is the length of the driveshaft different between a Turbo 350 & 400? I appreciate any information - thanks
