You can go over .500 with stock rocker arms. You'll just need to change valve springs and have the heads worked on to cut down the guides. Use positive seals.
That makes me feel better. The heads have already been worked over and have new valves and springs (not sure of the rate but it's for sure heavy enough, possibly replacing though).
I am most likely going with the CompCam XE274 with 1.5 rockers
