Edelbrock Performer RPM Cylinder Head - Assembled - 2.150/1.680 in Valve - 218 cc Intake - 77 cc Chamber - 1.460 in Springs - Oldsmobile V8 H760C42XL If you are between sizes

If you are between sizes

Work with both Holley accessory drive brackets and factory LS Corvette brackets

The tape does the math for you

(1) 4-Way Connector (male)

Instead of filling a very large shell with lots of padding for a size small

Edelbrock Performer RPM Cylinder Head - Assembled - 2.150/1.680 in Valve - 218 cc Intake - 77 cc Chamber - 1.460 in Springs - Oldsmobile V8 H760C42XL If you are between sizesProduct Description: Cylinder Head Performer RPM Assembled 2. 150 1. 680 in Valve 218 cc Intake 77 cc Chamber 1. 460 in Springs Aluminum Oldsmobile V8 Sold Individually Since 1938, Edelbrock has been committed to making the finest high performance products in the industry. The famous Edelbrock Intake Manifold, Edelbrock Aluminum Cylinder Heads and Edelbrock Water Pumps have become the industry standard. Edelbrock cylinder heads offer improved