Choke: Manual. Engine/manifold vacuum is not related and has no effect on the operation of the carburetors secondary system. Secondary Type: Vacuum. Part Type: Carburetor. Carburetor Flange: Square bore.
0-80457S For Holley 4160 Performance 600 CFM 4 Barrel 4-Barrel carburetor set
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GENUINE Edelbrock 1406 Performer Carburetor????????600 CFM 4 Barrel Carb For 4.0 V8