Part Type: Carburetor Float. Brass Float. 1975 Buick Regal Engine: 5.7L V8; Primary; Carb MFG: R-4; Carb Model: M4MC;. Refer to OEM interchange carburetor number to verify all components;. 1976 Buick Regal Engine: 5.7L V8; Primary; Carb MFG: R-4; Carb Model: M4MC;.
