With KRE heads from SD Performance and 1.65 Crower stainless rocker arms, I was getting a very light tap and kiss marks on my reproduction chrome covers with the thickest gasket. Ended up adding a 3/8" cover spacer and thin rubber gaskets and problem resolved.
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Michael
Oshawa built 1 option Judge basket case. 463, SD KRE 295's, CNC'd factory intake, Cliff's Qjet, Stump Puller HR cam, RARE RA manifolds, Pypes exhaust, T56 Magnum, McLeod RXT clutch, 3.42 12 bolt. 24 year project almost done... 
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