I just rebuilt a 86 jimmy and put a 375 hp 350, rebuilt 700r4, rebuilt 14b sf 3.73 eaton rear end. Problem is truck still drives like a old truck. It doesn't seem like it has that much HP. These are two things that i still need to do, timeing; I never timed it with a light I don't know if that would make it any better b/c it sounds right. The other is the tv cable it can't be right b/c the trans shifts to hard and just doesn't feel right. I read and did research but may I am still doing something wrong.