The Edelbrock Performer cylinder head for 1962-1979 Pontiac 389-455 engines with 87cc combustion chambers is a 50-state emissions-legal option for many 1965-1979 vehicles. It is patterned after the Ram Air IV head and provides a streetable 9.5:1 compression ratio aimed at maximizing performance on lower-octane fuel while supplying quality intake and exhaust valves and valve springs for everyday-driven muscle cars.
Edelbrock Single Perf Pontiac 87cc Head Comp