I have a 79 F-250 that after getting up to normal temperature will shut down and will not run again till it cools off. I'm positive it's an electrical problem. Any advice would be great, thanks.

start testing wires to the igniton when it dies. see if you find something. what kinda dist are you using? have an elect. fuel pump? what carb are you using.

As far as I know it has all stock factory equipment for the 351M engine. The only work I've done to it is new spark plugs.