Pontiac 326-455 V8 PERFORMER RPM PONTIAC (1500-6500 rpm) Designed for 1965-79 street 326-455 c.i.d. Pontiac V8s (except Ram Air V). Will not fit 265/301 V8s. Provides maximum high-rpm power while maintaining good throttle response for street. Recommended for high-performance street, strip and marine. Has clearance for HEI distributor. Will not fit under Trans Am Shaker hood without modifications. Carburetor Recommendations: Edelbrock Thunder Series AVS or Performer Series carb, 650-800 cfm. Installation Notes: Recommended intake gasket: Edelbrock #7280. No provisions for OEM choke. OEM carb requires conversion to electric/manual choke. For 1968-71 use #8015 throttle bracket. Manifold height: 1-1/4" taller than stock, A-6.88", B-8.00" (measured to engine block), see A/B Measurements. Port exit dimensions: 1.10" x 2.06".