69 dart gt dies when car gets warm. wont start untill cooled down. help.

Hi guys I'm trying to help my father in law with his car. He has rebuilt motor and trans last summer and everything worked fine. He had the car in storage for winter and recently got it back on the road. The problem he is having is with in about 5 miles of driving the car dies. There is no spark untill the car cools down. Any ideas what would cause this? Any help is greatly appreciated.

I would guess the condensor. Typical when it's shot!