The factory Mopar drag race team use to recommend that you set the ductile iron rockers up so the pad would start at the inner third of the valve tip closed and be on the outer third of the tip at max lift, that has worked well for me on many motors up
I have had RAS blueprint, bush and change the ratio on a lot of sets to get them the do that up scope


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)