The Edelbrock #41309 Classic Series Valve Covers are designed for Pontiac 301?455 V8 1962-79 applications. Edelbrock first made these aluminum valve covers in the late '50s and they're still a classic. Made of heavy-gauge sand-cast aluminum, Overall height is measured from base to top at the highest point. Edelbrock classic valve covers can be machined to accept breathers if desired.