Super tuning car runs good shooting for great

Are you willing,to commit to premium(a j oke,in itself ) pump gas?.. At 200 cranking : I would Personally,I would start with wideband O2 sensors,before adding that vacuum advance..FWIW,quite a bit of adjustments,via allen wrench in stock mopar diaphragms. I would worry about air & fuel ratios ,before vacuum advance. J.M.O....