T-56 Transmission Install Thread

Hello. I am considering a 5.7 hemi or LS1 (or 2) for a future car project. Do all these transmissions mount up the same (minus the bellhousing of course)? Another member is selling a kit to swap t56 transmissions into Abodies and he has stated its for the Ford t56. Would I have to use the t56 for the ford or do all of them have the same mounting location? Thanks for any help and sorry if I missed the answer somewhere on the forum.