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Holley warns in the instructions that p-to-v must be checked with the large 2.02-inch intake valves in the Holley Street Avenger heads and the bigger Lunati cam. We rigged up a dial indicator with a set of lightweight checking springs, and using the degree wheel, checked p-to-v clearance. Sure enough, while we had plenty of clearance on the exhaust side, the intakes were tight, with just 0.030-inch clearance without a gasket. Assuming a 0.039-inch-thick head gasket, we might have barely squeaked by with a clearance of about 0.070 inch, but 0.080 is closer to a comfortable minimum. View Related Article
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