Quote Originally Posted by Supra_Comp View Post
My opinion on changing cams on a stock bottom end and stock heads is that it will do nothing but kill your low end torque. You may improve efficiency and peak HP but in this world you are trying to get up and go.
I don't know the specs on the cam PCM used in these, but I'm certain with only 330 HP there is a lot of improvement to be had. I'd imagine the PCM cam is low lift and slow ramp rates. Changing cams for more power and efficiency does not mean an engine that idles rough at 1200 RPM and pulls to 7500 RPM unless that's what you want. Cam technology and lobe profiles have come a long way since the 80s. In any rebuild cam lifters and springs are typically replaced given how cheap these parts are. With a modern cam there can be torque improvements across the board.