When you're building a Hi-Po, never cut corners on gasket quality. Specify Fel-Pro or SBC Gaskets for the best overall quality. Fel-Pro's Print-O-Seal intake manifold and cylinder head gaskets afford you the best assurance against leakage. Resist the urge to spray head gaskets with copper coat because they don't need them unless you're laying down old steel or copper gaskets. Intake manifold cooling passages need help at times when there are pitted surfaces. Use Permatex's "The Right Stuff."