1961 Chevrolet P20 Series Engine: 4.3L L6;FuelSystem: 2BBL; Position: Carburetor To Intake Manifold;. 1962 Chevrolet P20 Series Engine: 3.8L L6;FuelSystem: 2BBL; Position: Carburetor To Governor;. 1961 Chevrolet P20 Series Engine: 4.6L V8; Position: Carburetor To Governor;.