1967 Plymouth Barracuda Engine: 4.5L V8;FuelSystem: 4BBL; 4 Bore Gasket; Open plenum;. 1967 Plymouth Barracuda Engine: 6.3L V8; 4 Bore Gasket; Open plenum;. 1967 Plymouth Barracuda Engine: 6.3L V8;EngineVIN: H; FuelSystem: 4BBL; 4 Bore Gasket; Open plenum;.