Thanks Patrick.

Mark,
I run 24 degrees of initial timing for your reference.

""good now get it right.""
What does this mean?

""A auto matic trans is hard to get it to shift right on its own. Driven hotrods need manual bodies, because all the downshifts/upshifts are screwed.""
Then you need to tune your auto tranny. The shift points can be made to just about what ever you want with aftermarket governors and testing different 1-2 and 2-3 shift springs. By the way, what does this have to do with my vacuum question?