Hi Kern,
There is a 3/8" nipple on the back of the carb, it goes to the breather on top of the driver side valve cover.
There is a nipple on the intake manifold, I think 3/8" too, which goes to the power brake booster, here...
View attachment 1314329
This is exactly what I needed to know. I was on the right path too Kern, but you confirmed my grey area thanks man! So it was in that ballpark. Any more degrees =/- and it falls on its face. Let's now assume initial timing is now set. Still doesn't idle but does rev strong and smooth. My confusion at this point is to when I screwed the mixture screws all the way in, nothing happened!