Might be a lot of effort to straighten this one out. Clues..... "Seems to run out", "cam card to 7,500". No other posts with any more information.
And I think you might understand what kind of king kong effort it would take to get an X head to flow to .650" lift. Not many guys on the planet can do that. Any head buy a competent porter would probably be better, once you know how the present heads flow.
