Original 4MV Quadrajet by Carter. Rebuilt carburetor for Big Block 396/427 engines of Impalas, Chevelles, Camaros. Correct for A.I.R. vehicles with manual transmissions.
Did all L78 and LS6 Chevelles come with A.I.R. smog pump regardless of plant origin, transmission type, etc.? If not, what would determine if it had to have the smog pump or not?