So I've had a couple people now advise me that manifold vacuum advance is the way to go. I did a little test a while back and it didn't seem to work for my setup but I think I might make another run at it. I know most of you guys are original types so I figure you're running ported adv like me but they say it was mostly emissions related even back in the day and not the best setup. Anybody else running off manifold vac for adv?