Your condenser could be junk (even if brand new - most are). If you put a new one on, put the old one back on and see what happens. Make sure your vacuum advance is functioning.
Check for vacuum leaks around the carburetor and manifold and both ends of the windshield wiper vacuum hose by spraying choke cleaner around those areas while it's running. If the RPM changes, you have a leak in that spot. Use a bottle of propane gas to do the same thing.
Look down the throat of the carb while its idling and see if fuel is dribbling off the center venturi. Fl;oat level could be too high flooding the engine.
Thanks for the input!
Would a junk condenser still provide a nice clearly visible spark? I would've assumed I would find out if there was an issue with it while checking the ignition system over and I didn't see any signs of it going bad, spark seems strong and stable... And the engine does ignite and run for short periods, just not very stable...
I did try to check for vacuum leaks using some of cold start helper spray, it made no noticable difference as far as I could tell but it's hard to say since I can't get it to idle or maintain constant revs reliably...
I don't think it's a flooding issue, haven't seen any classics signs like wet sparkplugs or felt a strong smell of gas or anything... Looking down into the carb it produces a nice squirt of mist when opening the throttle, and I can hear it squirting when closing the choke...
Maybe I should try boiling the carb and blowing it clean once again, probably doesn't hurt anyways and it might dislodge some stubbord gunk that I have managed to miss.
