I pulled the intake, and looked at the gaskets. Didn't see where it may have been leaking vacuum. Although. There was very little gasket along the top runners. I matched up the new gaskets to the heads, found the best fit. Used a very thin layer of permatex ultra blue at the water passages and crossover to glue the gaskets to the heads ( to maintain position ) and a 3/8" bead on the ends. Dropped in a new ignition while I was at it. Timed it to about 18' initial and about 32' total advance, and installed the vacuum limiter set to 18'.

Still shows low vacuum and still runs like it has a vacuum leak.