im gonna be using my six pack setup off my old motor so there's no chance I'll ever be playin with the nitrous. The car already has the Strange S-60 Dana with Spicer 4:10s from Cass (Dr. Diff)as well as their driveshaft with the Chevy u-joints. The 4 speed is tough enough on it's own, so what is there to break with a 505?