Part Type: Carburetor Float. Brass Float. Refer to OEM interchange carburetor number to verify all components;. 1972 GMC K35/K3500 Pickup Engine: 5.7L V8; Primary; Carb MFG: R-4; Carb Model: 4MV;. 1974 GMC K35/K3500 Pickup Engine: 5.7L V8; Primary; Carb MFG: R-4; Carb Model: 4MV;.
