I have put a motorsport E-303 cam in a 1998 ford explorer 5.0 engine. The cam is suppose to give a 498 lift on the intake and exhaust. I put a dial indicator on the pushrod and it is only doing 298. Any help with this matter? I am putting the engine into a 1990 saleen mustang. It has 1.6 ratio roller rocker arms. Any help will be greatly appreciated! Thanks