What happens when you run a cylinder head that is too big for your motor? I have a friend that has a stock 502 BBC and his "car" buddies keep telling him to run a set of dart 355cc heads on his stock 502. This motor is low compression with a hyd flat tappet cam in it. He is running it in a jet as well so it will never see any kind of R's. I figured that I would post this and he can read it with his own eyes.......