Was running but now after pulling alternator wire, it won’t run

Hey everyone! I have been doing a lot of reading through a few of the different threads. Yesterday working on my 69 dart 340 with a 6AL box, the alternator wasn’t charging (I just ordered my third one). in the mean time I put the original back on which also doesn’t work. My father and I tried seeing if there was a draw on the car and where it could be coming from. He pulled the wire off the back of the alternator and I started the car. It ran for a couple seconds then shut off and won’t restart. The 6AL box flashes 5 times showing it’s in working order and firing. But the car has absolutely no spark. I also have ballast resistors on the car which I am going to bypass. Can anyone help?