Swapped to Electronic Dizzy, Ran for a minute, now it won’t start!

I have a 71 318 in my Dart and bought the Proform 66991 conversion kit from Summit. Installed it today, and it fired right up. Instructions say to start at 5° advance first and tune from there. When it fired it was at around 15°. Hooked up my vacuum gauge, and knocked the linkage for the choke valve and stalled it. Now it won’t start at all. Added a ground wire to the ECU as recommended. It’ll try to fire, sounds like 1 or 2 cylinders fire, then it dies. Or sometimes it doesn’t fire, but diesels as I stop cranking. I used the new ballast resistor from the kit, wired as per instructions.

I’m not a mechanic, I’m pretty new to distributors, so I’m at a total loss. Any ideas?