[flipper35]

FWIW, as far as handling power I can give you as little background.

I use the a833 mopar 4 speed. When Chrysler designed this they basically took a BW T-10 and made it 30% larger. It is used behind all kinds of big torque blocks. The TKO-II has a larger input shaft, the gears are cut straighter and the gears are a bit wider across the face (although the a833 and TKO-II sync collars seem to be interchangeable). The engineering rep was quoted in Mopar Magazine as saying they run them all day in cars near 800 ft/lbs of torque. I wouldn't worry about breaking one. Actually, if I had 3 grand laying around I would get one.