Losing Ignition After 5 minutes

[57MexicanTBird]

My 57 with a 312V8 is cutting out on me after about 5-10 minutes and the engine just dies. I am thinking it might be the ignition system is getting hot and the coil or condensor is failing. Can someone verify this and/or offer another idea?

Thanks

 

[paul2748]

Could be either. I would try the condenser first.