1974 Chevrolet C20 Suburban Engine: 5.7L V8;FuelSystem: 4BBL; 4 Bore Gasket; Open plenum;. 1974 Chevrolet C20 Suburban Engine: 7.4L V8; 4 Bore Gasket; Open plenum;. 1975 Chevrolet C20 Suburban Engine: 5.7L V8;EngineVIN: Y; FuelSystem: 4BBL; 4 Bore Gasket; Open plenum;.
