to answer if you have ported or manifold vacuum to the dist see if you have vac to the dist at idle. Your timing is off, it should be very close to 35 total(w vac adv DISCONNECTED) at the point where it stops advancing even if that is 3500 or more then see where that puts your initial at,going the other way you might bump your initial up to 10 or 12 for a start & see how it acts & what that puts your total at(again w no vac adv hooked up). then reconnect your vac adv & take her out.