For what its worth I spent the money for a TKO600 and am not a happy camper. It might have something to do with the guy handling the lever coming out of the middle of the transmission (!) but I sure had no sucess with mine. I went back to the 4 speed. It was in a '56 Chevy with a 292 that has been pretty well warmed over but still very streetable. It has run high 13's at just under 100 mph. I don't feel like I got my money's worth on the TKO. I've put it in my '64 C-20 pickup (with a 292,of course) that I will be using for a tow truck. Even in it I'm not thrilled. It shifts OK but is kind of noisie. We'll see how it does.
