1967 Plymouth Belvedere Engine: 6.3L V8;EngineVIN: H; FuelSystem: 4BBL; 4 Bore Gasket; Open plenum;. 1967 Plymouth Belvedere Engine: 7.2L V8; 4 Bore Gasket; Open plenum;. 1968 Plymouth Belvedere Engine: 6.3L V8;EngineVIN: H; 4 Bore Gasket; Open plenum;.