A T-56 manual transmission (GM) mated to a 1UZ-FE (Toyota) is pretty sweet. The 1UZ was automatic transmission only, and so you have to custom build an adapter plate to get it to mate to a stick. Typically, people do R154 trannies (also Toyota). Never heard of a T56 swap which is a muuuuch better trans.
Later in life I want to make a 1UZ Supra track car that's more or less got this guy's setup: