T-56: GM versus Ford

[mdlackey]

Can anyone tell me what the difference is between a "Ford" T-56 and a "GM" T-56? Input shaft? Bellhousing? Expect bellhousings to be differnt, but are the mounting bolts for the BH into the tranny all the same (standard)?

Have a bead on a Ford T-56, but want to use on my Pontiac engine, and want to know what I might be getting myself in to.

Thanks,
Dave