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

So a little more info, I got the car a month ago. It was running, but would fall on it's face with anything but the lightest acceleration or load, it would stumble and stall if I didn't let off right away. Everyone I spoke with thought it was a carb issue, but when I put the timing light on it, it was set to just under 5* advance. I set it to around 12-13* advance and that issue mostly stopped. It still stumbled briefly on hard acceleration in lower rpms, but at speed was fine. At idle it had the occasional light pop from the exhaust, almost like it was missing occasionally. I figured since I was going to upgrade some things on the engine, I might as well start with changing to electronic distributor. Planning on going 4bbl over the winter, just looking for drivability for the rest of the summer. Installed the Proform 66991 Distributor as per the instructions, and now with the timing at 12* it won't start. Fires briefly, maybe on one cylinder, and then dies. Advance the timing a LOT, (don't know how much, only a TDC mark on the HB, and that gets hidden by the rad hoses after 12 or 13*), but likely 30 or 40*, and it chugs like it's having a hard time even turning over, and then it will fire. Idles a little rough, still with the light pop/miss, and when I put it in gear it dies immediately.

I tried putting the old distributor back in the other day, seemed to have all the same issues, and then after about 5 minutes of farting around with timing it started, and I took it for about a 1/2 mile drive. It stalled when I was turning around, fired right back up, but when I got home it stalled when I was backing in to the garage and wouldn't fire again. That's when I started over and reinstalled the new distributor from scratch, re-checking the wiring I had done. Installed a ground wire from the ECU to the bolt on the engine the battery is grounded to. Having all the issues as I described. Tried turning the distributor 180* in case that was the issue, but immediately back-fired out the carb, so I know that's not it. New wires, new plugs, gapped at 0.035. Checked reluctor gap on the new dizzy, it was closer to 0.015, but even with it at 0.008 it hasn't improved.

I don't think the timing marks are too far off, as with the points dizzy, it ran pretty well at around 12-13*, which seems about right compared to other threads.

I have a new fuel filter to install, and have a new coil coming, as the old one was pretty beat up. I'm hoping that one or both of these are the issue. Can you test the coil without the engine running?

Also, the carb looks like a Carter BBD, but has no markings whatsoever, so I think it might be a chinese knock-off from Amazon, so I can't get a rebuild kit for it, in case the carb has a clogged primary, or something like that. Can you take apart a carb and clean it, and put it back together with the old gaskets, or is that just asking for more trouble?

Sorry for all the questions, I'm pretty green when it comes to some of these things, and this is my first MOPAR.

Thank you!