Well i installed the 12yr old trans to see how it would do, it did well but i new it needed refreshing. Anyway the best tranny guy and i became good friends, and he offered to teach me how to build the 350TH. It is in the car, and he want it to hit harder, so he pulling it to change a few things, now i can build my own! Thats a friend. Anyway, the car was running 6,500rpm thru the trap, and that maybe due to the age of it, but if it does the same thing once i get it back, do i need to up the tire size? I had a set of 26x10 Hossier, do i need a taller tire, or will this kill the car(3.42gear).