When you replace those rockers, I highly recomend the comp cams all steel roller rockers. Aluminum rockers "work harden" and are considered a throwaway item after a few thousand racing miles. The steel rockers have less "felt" weight at the valve than most aluminum roller rockers. Also, if the budget permits and you are concerned with rocker arm stud deflection or breakage, get yourself some stud-girdles. After these, it's a shorter jump to that high-intensity roller cam you've always wanted (and new valvesprings, and possibly corrected legth pushrods). But don't bother with roller tip rockers that have no trunion bearing at the fulcrum. This is where the friction is most greatly reduced,
oil temperature is most affected(as far as the rocker is concerned), and stability is most needed.