Made the swap to electronic ignition and the car barely runs now

I am with @krazykuda on this. The Mancini kit 4 prong ICM. If you are running the power wire for the ICM through the ballast, you arent going to get a full 12V that the ICM wants. If you are using all 4 wires on a 4 prong ballast with the Mancini kit, you are doing it wrong. I would suggest you ditch the 4 prong for the 2 prong that came in the kit. Then all you need to do is bridge the stock wiring that goes to the ICM that was originally going through the ballast. You could also bypass the ballast for TROUBLE SHOOTING PURPOSES ONLY and see if it gets better.

I think you have multiple problems... spark is one of them, but also you need to verify TDC and sort out your fuel problem.