i have a turbo 400 trans out of my 90 ss454 3 spd no over drive, im pulling he drive line because the motor is shot, my plans are 550 to 600 on gas spinning to 6k. question is... any one here a TH400 guru or a reputable shop for building this bad boy up. i need a basic idea how much this is going to cost me, thanks the truck will be mostly cruised on weekends few track outings.