I'm prepping for a PS conversion on my '76 FJ40. Got a gearbox from a 1986 Blazer, but I'm hearing that it's better to use the gearbox from a GM car due to the superior number of rotations. The Blazer box gives me 3.5 turns, which should be ok. Anybody got any experience with using a GM box from a truck v. a car? How many rotations from a GM car gearbox? Thanks fellas!!