Thermoquad question

OK after looking at the diagram here's what you need to do: cap off the manifold vacuum source going to the "green" line and get rid of it. Unplug the other line (pink) which I'm assuming is hooked up to the distributor as your 340 shouldn't have the Electronic Lean Burn system and start the car and idle it; put your finger over the open vacuum port and see if it is pulling vacuum at idle. If it is cap it off and then check any other ports on the carb that only pull vacuum when the throttle is above idle.

Or for now just leave it unhooked and it should run smooth without vacuum advance lol

EDIT: and you don't need a "filtered air bleed" that's some stupid Lean Burn component