67 cutlas supreme original 330 4 barrel jetfire engine. Where does the vac advance hose go on. Is it full manifold vac or on the carb port, so vac on throttle opening, vac is currently on manifold port so has full vac advance at idle

 

This question has been source of arguments for a long time. Neither answer is wrong with reference to manifold vs ported vacuum. Experiment and use the source the engine likes the most.