Ok so as I understand it and have gathered from reading all day yesterday here's basically how it goes for a stockish/mild 302. First set base timing around 12deg with Va.c. Adv unplugged. Then plug vac adv back up. Using timing light hold rpm at 3000rpm and see what deg you have. Then adjust vac adv until you have about 32-34deg at 3000 rpm. Is this correct?