Dart Suddenly Shut Off & Won't Start

It was the positive battery terminal. I would have never checked that. I would have been drawing lines to follow my service manual diagrams and disconnecting the bulkheads looking for melted connections. Thanks FABO.
Glad you found your problem.

I've had this happen to me numerous times in my lifetime.

I learned a good lesson dealing with this..

If everything was working fine before the car was stored and this happens, look for the easy solution first.