Well, I had a '65 Olds cutlass rear with a 455 Pontiac, a Muncie M20 and a 3:23 rear gear. (In a '79 Lemans wagon) Dragstrip launches with drag radials, produced a 1/2 turn of twist in the stock axles. (paint a line on the axle before install) When I was younger, my friend snapped an axle in a...