distributer cap mods?

I'm not disagreeing with your advice at all, in fact a member said sounds like a vaccum leak to me, so here i am agreeing that it most likely is because it has the same symptoms as it did before with a vaccum leak at the intake manifold.
I have read pages and pages of discussions on vaccum advance, not only on mopars but chevy, and ford. And i came to the conclusion there is no right answer. The right answer is go with what your specific engine and combonation wants and or likes.