I had purchased the Performer RPM aluminum cylinder heads for my 440 and would like to know if I could get away with using the stock rocker arm assembly. I am using the matched performer RPM cam also which I think is like 480 lift
It is of course best to read the instructions that come with the heads. Briefly, they are designed to work with the stock rockers. However Edelbrock recommends that you use adjustable rockers, O.E. or aftermarket, for anything over stock lift.
I read the instructions and they dont make it 100% clear that the adjustable rockers are required and when I made the purchase I thought I could just use the stock rockers. So with the combination between the Performer RPM Cam and Heads am I for sure required to use the adjustable rockers????????????????
Maximum stock valve lift intake is .450" and .458" exhaust. You "think" your new cam is .480". Comp Cams "recommends" that you use adjustable rockers for anything over stock lift. People have successfully run greater than stock lift with stock rockers. You are free to choose your own course of action and accept the responsibility of what happens. You, for sure, don't have to do anything you don't want to.