My car is a 1970 Dart Swinger. The drive train is this, 418 stroker 501 hp 521 tq. Currently has a 4 spd but I'm going to change to a 904 reverse pattern manual valve body, before I brake more parts! The car has an 8 3/4 with 3.91's. I have SS springs 002/003, Rancho adjustable shocks...