She runs!!! But now I can't get her to idle at 1,200. The carbs are all within a few mmHg of each other no matter what the engine speed is, but I can't seem to get her to settle down to a comfortable idle. I am not using the choke, and the fast idle screw isn't touching that cam on the choke shaft. She'll fire up, idle around 1200-1400 for a minute or two, then jump to 2k-3k and stay there until I loosen the idle adjustment screw...then come back down to 1200 and promptly die. I've read that it could be a sync issue (which I think I've eliminated), or a vacuum leak. Where could there be a vacuum leak? Is it just the o rings to the top end?
EDIT: Just adjusted the mixture screws slightly (1.5 turns out instead of 2 turns out) and now the #4 carb is leaking...again...