I know the sm420 is strong but is it big torque strong? I am curious cause I would love to have the sm420 back in my 1ton instead of the th400. The adapter kit with clutch total 500$. But I don't want to destroy anything. My big block buick is producing over 500 lbs of torque over a wide early rpm. Peaking at over 550.
Edit... just realized should have posted in driveline section.... sorry.
Last edited by 1tonpete; 03/17/2014 2:57 PM. Reason: wrong place
