Intermittent spark

I just got my alternator back for my 70 Duster today. Bolted it on and fired the car up. The 440 started right up just like it always has.
It’s got a Summit brand electronic distributor and a blue 4 pin ECU and a two post ballast resistor that came with my MSD blaster coil.
I was about to start setting the timing with my new timing light and as soon as I turned the distributor probably 1°, the car shuts off. I get it started back and it’s running rougher than normal so I put the distributor back EXACTLY where it was to begin with. The car dies and won’t start back. I checked all of the wires to see if I somehow unplugged something but nothing was wrong.
The car is getting plenty of fuel so I know it’s not that. My timing light was also not flashing or showing the rpm like there was no spark flowing through the #1 spark plug wire.
Because I didn’t want to keep cranking the engine trying to find spark, I pulled the distributor and started spinning it by hand. Doing this I almost gave my Mom a heart attack because my dumb*** only removed the #1 wire and one of the wires I left connected evidently found enough spark to ignite the fuel in one of the cylinders that had its exhaust valve open. It sounded like a 12 gauge going off.
After that happened, I thought it must have spark. I reinstalled the distributor making sure I had the rotor facing the proper direction and tried starting it again. It fired two or three times and then stopped.
I checked all of my grounds, made sure all my wires were plugged in with good connections, tried a spare coil and an old electronic distributor with a different rotor and cap.
I’m suspecting it’s the little blue ignition box but I have an old points style distributor I want to try before I buy anything else.
Is it true that I just run the one wire from the points style distributor to the negative side of the coil? Or am I going to have to rewire the whole ignition system to try it?

Thanks for reading this stupid long thread.