[Aubrey N Bruneau]

No doubt, Greg... in our Stock class, moving the cam around, in order to achieve clearance, is all too often the case. Makes it even more crucial to degree in your cam, check clearances. I run mine 4 degrees retarded. My exhaust lobe is not the excessively violent action ( minimized seat timing ) compared to that of my intake lobe, so that, combined with the lighter exhaust valve, makes it easier to control. I have my valves "sunk" approx .050" deeper than spec ( creates somewhat larger head comb chamber cc's ), in order to achieve my whopping .035" piston-to-valve clearance on the exhaust. Intake is at around .070", so it's fine. Why insist on retarded ( maybe it comes naturally ? ) ?
I just couldn't ignore the 22+ HP and 200-300 RPM increase on the dyno.