Car wont start sometimes... need help.

I would check it out when it is acting up to see if its missing spark or getting gas. A lot of times things break down when they get hot. I would put a plug on a wire and crank and see if your getting a nice blue spark, also check at the coil wire for a blue spark. Personally if I was you and there is a ignition issue , I would do a mopar electronic conversion and ditch the points, factory electronic setup is a good reliable setup , no more maintenance with burn up points, or shorted condensors, etc.