What late model 6 speed Corvette transmissions will fit into a 1972 Corvette?

No late-model (meaning anything beyond the C4 generation) 6-speed Corvette transmissions will fit directly into a 1972 Corvette without significant, and likely prohibitively expensive, custom fabrication. The differences in chassis, bellhousing patterns, and overall dimensions are too vast.

While some enthusiasts undertake such projects, they require extensive modification to the chassis, custom driveshafts, potentially custom motor mounts, and a complete re-engineering of the transmission tunnel. The cost and complexity far outweigh the benefit for most people. A far more practical and less expensive approach would be to use a transmission from a C3 Corvette or a Tremec TKO or similar aftermarket unit designed for the era.