1975 Chevrolet C20 Engine: 5.7L V8;EngineVIN: Y; FuelSystem: 4BBL; 4 Bore Gasket; Open plenum;. 1975 Chevrolet C20 Engine: 7.4L V8; 4 Bore Gasket; Open plenum;. 1976 Chevrolet C20 Engine: 5.7L V8;EngineVIN: L; FuelSystem: 4BBL; 4 Bore Gasket; Open plenum;.
