I am hearing good things about that T56, but the six speed trannys are so long and heavy, I think I am leaning 5 speed. I really like the Richmond Super Street but $4,000.00 is big paper. Chevy Performance also has a Tremec version but it is also just as expensive. Plus I would need to add a bellhousing, clutch, pressure plate and bearing, and swap out my flexplate with a flywheel. Since it is not originally a manual shift car, I will need to get a pedal assembly, take out the column shift, change the dash housing (because I will need one for a manual shift without the indicator) and cut a hole in the floor and redo the driveshaft. I think I am really more worried about all the work more than the money, but I think it would make me happy in the end.