[Jack21]

Jack,

I'm thinking valvesprings more than anything else, particularly with a hydraulic roller and mix & match parts. The roller lifters tend to be heavier than regular hydraulic lifters, so a stiffer spring is needed. Talk to the tech guys at Crane & Comp and see which spring you should be using.

Almost any aftermarket performance cam, even the milder grinds, should be able to rev to 6000 - 6200.