with the big missle pump you may want to put oil drains in your valve covers. the stock oil returns are not big enough to do the job. they were never intended to deal with that kind of volume. a fitting in the valve cover spacer with a hose going back to the pan. I ran number 10s one on each side. with those rockers don't put a restrictor in the block to limit the flow in a attempt to fix the problem. the rockers need all that oil. the returns are the way to go.