The Edelbrock 77359 Victor Jr. Small Block Ford cylinder heads offer high horsepower potential on competition level engines and are compatible with OE valve train and pistons for bolt-on convenience. VICTOR JR. 20 Deg - 210cc FEATURES: 500+ horsepower potential out-of-the-box using stock valve train geometry High-flowing 210cc intake ports and .130" raised 75cc exhaust ports Available with 60cc or 70cc combustion chambers 70cc combustion chambers are ideal for turbocharged and supercharged applications CNC gasket-matched port entries/exits with blended valve bowls Spark plug holes and valves are in the stock location Valve cover rail raised .150" A relief in the head allows most roller lifters to be changed without removing heads