The car drives decently fine, it won't idle for **** though. I will check the rubber line asap. There is no return system on the car, this is a non-california 70' Dart. I don't have a coil and a ballast, I haven't checked IGN1 voltage, what should the spec be? 12 volts?
IGN 1 ought to be in the 11.5v range +/- if the circuitry is all good when in Run but engine not running, and battery decently charged.
When you say that car drives 'decently fine', does that mean that is accelerates fine and cruises fine? If so, then the most likley cause is not fuel delivery or a plugged line or cracked line; fuel delivery is at its minimum at idle and increases as you go off of idle to cruise and so forth.
Likely casues are: vacuum leak, idle circuit in carb gummed/plugged, or fuel pump weak. Since you report the idle improving a bit when you plugged the PVC line, then I would be exploring the vaccum leak first. You can find plenty of references in this subforum about spraying a bit of gas or other combustible fluid around the manifold flanges and seeing if the idle improves when this is sprayed at some location; there is the leak. Also, temporarily remove/plug all vaccum line frothe carb and intake manifold.
I also note that you 'found and fixed a loose carb'....did you just tighten down the carb base bolts? It may be time to put a new carb base gasket in; that would be a great source of vacuum leaks.
