1973 Chevrolet C20 Pickup Engine: 4.1L L6 OHV; FuelSystem: 1BBL; with System Mount Switch;. 1973 Chevrolet C20 Pickup Engine: 4.8L L6 OHV; FuelSystem: 1BBL; with System Mount Switch;. 1973 Chevrolet C20 Pickup Engine: 4.8L L6; with System Mount Switch;.
