A set of checking plates were 100.00 when I bought mine. Probably not much higher from Bruce right now. A fixed orfice tells the story. Much like before and after flow numbers. Although many of us have stepped up in the size of cams we run we still aren’t using the flow that is available on many of these ported heads. A .650 lift cam minus deflection and valve lash is child’s play. My cam isn’t even a billet roller cam. It’s a cast steel cam made for a street car that I got for to good of a price to pass up.
