Automatic stalls in reverse.

Im really not sure on that one. The car when I bought whenever I put it in to any gear it would stall. All the vacuum lines were a mess. It came with a new Edelbrock carb that was put on to hopefully cure the problem, but it did not have the Mopar adapter to correctly work the throttle and transmission kick down linkage. I had one in my shop and put that on adjusted the the a carb and transmission linkage according the service manual, set the idle with a vacuum gauge, and even adjusted the timing some all of which improved it enough to drive it some and make it to the transmission shop. I didn't really start having the electrical problem until after the rebuild and I drove it some. If it starts and you can drive it, but still stalls I would keep looking for some like I just described. Honestly I wouldn't take my advice because even though I've been fixing stuff my whole life, starting with a bicycle when I was a kid, it's really not any specific knowledge but an accumulation of such forgotten and remembered over the years. Recently though the solutions to the problems I've been having I found by reading a few hundred posts on sites like A Bodies only.