Chevrolet 396-502 V8 PERFORMER RPM 2-O (1500-6500 rpm) Designed for street 396-502 c.i.d. Chevy V8s with large oval-port cylinder heads (1975 and earlier). This manifold offers the latest technology in dual-plane high rise design and builds outstanding horsepower while maintaining good torque and driveability. No provisions for exhaust heated chokes. Accepts late-model waterneck, air-conditioning, alternator and HEI equipment. Will not fit under stock hood of Corvette, 1965-67 Chevelle, or 1967-81 Camaro. Carburetor Recommendations: Edelbrock Thunder Series AVS or Performer Series carb, 650-800 cfm, use bracket #8031 for 1972-7. Installation Notes: Recommended intake gasket: Edelbrock #7203. Manifold height: A-4.45", B-6.0", see A/B Measurements. Port exit dimensions: 1.60" x 1.94".