My 72cc (and previously 87cc) E-heads with 1.5 Crower rockers and .390" net lobe lift works with the 1/4" thick Fel-Pro 'ram air' gasket and '67-up valve covers. Before the Crowers, I had Harland Sharps and those needed the pushrod end chamfered a bit to clear the valve cover.
I tried those 3/8" thick gaskets and the set I had were porous and always seeped oil. The Fel-Pro 1/4" ones are fine and have just enough clearance.
And, yes, I have an A6 compressor too. This is in a '66 GTO.
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