It's currently running with no vacuum advance. Seems OK like that, or at least no knock, but we'd like some more advance back. I don't drive it, and my bro doesn't drive it as much as he should IMO. It's a nice car. 1968 Cougar.
I think he tried it with manifold vacuum... i don't know. It was running with ported and a racing cam, but I changed the cam for street driving. It wouldn't go slow without riding the clutch before. Since the cam change it's much better.

It smells rich still, but he's running 66jets in a holley 650(?). It's a weirdly modified 379 from a 351W... chevy pistons, Mopar rods...
http://www.bacomatic.org/~dw/dehaven/dehaven.htm

it still goes like stink though. I'd just like to get the advance when it likes it and not when it doesn't. Do you think the adjustable advance kit will help?

edit: re-reading. you think the vacuum kit will not help? darn.
It seems like the ported vacuum actually increases at load. weird/imagined?