well my dad has 35+ years rebuilding and installing trannys mostly gm.My question is can someone point me in the direction of a build kit for a 60e.The supplier my dad goes throught only carrys mainly kits for remaining stock.And most of the shift kits and other parts that he uses are for 350/400 and 700r4 that he buils for drag cars,boggers and rodders.Im wanting to beef up my tranny so i t can handle around 400hp at the wheels.