THIS IS A ONE BARREL ROCHESTER CARBURETOR USED ON 6 CYL CHEVROLET ENGINES. PART NUMBER IS 7044014. CARBURETOR IS A GOOD REBUILDABLE CORE. THIS CARB SHOULD ALSO INTERCHANGE WITH OTHER 74 GM 6 CYL 250 ENGINES IN PONTIAC, BUICK APPLICATIONS ACCORDING TO HOLLANDER MANUEL. CHECK YOUR APPLICATION FOR PROPER FIT BEFORE BIDDING.