The Edelbrock part #77929 Big Block Chrysler Victor Series cylinder head is used by many of the best racers in the country and are the best choice for all-out competition. Edelbrock engineers work with leading racers like Billy Glidden John Urist and Pat Musi to produce the ultimate components for racing. The end results is a competition ready cylinder head that features a cylinder head which is compatible with OE valve train and pistons for bolt-on convenience while Victor cylinder head features raised runners revised chambers and relocated valves for all-out competition. VICTOR B/B CHRYSLER FEATURES: The best standard port location cylinder head available for competition big-block Chryslers. Intake ports are raised .650" exhaust ports are raised .250" for improved flow. The intake flange is extended .950" to eliminate the need for intake spacer plates. Cylinder head will fit Edelbrock Victor manifolds for both high and low deck engines. Sold without springs or retainers; use recommended springs to match your camshaft. Exhaust flange is extended .300" from stock (same as Mopar Stage 6) featuring dry exhaust bolt holes with Heli-Coil thread inserts. 72cc combustion chamber volume. Cylinder head part #77939 comes bare with valves only.