Edelbrock part # 41929 Classic Series Valve Covers are designed for Chrysler Big-Block 383/440 applications and have a Satin finish. 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.