I can hook up and tune fuel injected cars all day long, but I have pretty much zero experience with carbs.

I stuck a new holley replacement carb on my slant, but it's been a while since I took the old one off and I forgot where all the vacuum lines go.

I have a picture where the ports are marked and numbered, the only thing I am looking for now is a vacuum source for my distributor, and I'm going to cap off everything else that I don't need.

Thanks in advance.

Get a vacume gauge and hook it up to the ports and find the one that has little to no vacume but gradually gains vacume as the throtlle is actuated. The #2 should be the one you need on that carb.

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Even in moderation i am excessive!

i would think that it is number one. it is higher than the throttle plate so it should be timmed vacuum, if you dont have a vac gauge just put your finger over it and see if theres vacuum at idle, there shouldnt be for your dist vac, you dont want it to advance at idle...

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'72 Valiant DD for over a decade-225-Disc brakes, big T-bars, big Sway bars f/r, carter bbd/super six, GM HEI, 2- 12" subs in trunk, 1000w amp...
'77 cherokee cheif widetrack-360-33x12.5 tires-no lift. keeps driveway dry-project/backup DD/mudder

No need to guess, go and look it up. Here is the Holley 1945 operation and rebuild manual (pdf).

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Too many people who were born on third base actually believe they've hit a triple.