[Purdy Swoft]

I use stainless steel valves with the original mushroom style stem . I use adjustable lifters and adjust for sixteen thousands clearance . This same clearance of sixteen thousands was recommended for both intake and exhaust valves by the grinder of my super street Winfield 3/4 race regrind cams . Less clearance gives a small fraction more lift . Extra clearance gives more time on the valve seat for more cooling of the valves and less chance of burning a valve . In the past , Snyders recommended sixteen thousands clearance .