what kind of rods does it have in it? if stock i would say no. I have eagle H-beams in my 440 and have shifted it at 7-7500 a few times to see what the car likes but don't remember what i was turning at the finish line. need to find out what your converter slippage is? do you know what your finish line mph is? thats to see if the converter is slipping to bad or not. also what size and stall was the one you took out?