Vermont Rock
Well-Known Member
Rebuilding my 383, 4-speed Road Runner & will probably stretch its legs to about 425-450 hp. It has the original 8 3/4" rear end with 3.55 gears. I'm wondering if it will be OK with the added horsepower & torque. Any idea of the safe maximum is ? No drag racing, but it will see spirited street driving. Thanks for your help. Rocket