Jumping bat + to coil + is a good and easy plan, I need to read back through the symptoms because I am unsure now of exactly how it acts. So correct me if I am wrong.
You run it till it gets hot, it dies. Does it sputter and die or just shut off like you hit the key?
Does it fire right back up or does it have to cool down a bit ?
This didnt start happening till it got good and hot once and now it’s a regular issue ?
I don’t know that I can offer any advice that’s any more help than has already been mentioned.
But couple odd ball things to check,
No particular order.
1, gas cap vent, easy enough to check, just loosen it up or talks it off.
2, only applies to solid cam, valve adjustment? Seems counter intuitive but I have seen very similar behavior ( engine dies when hot, runs perfect when cool ) .
3, double, then tripple check ground strap to block from battery and to the chassis, then run an extra just because, same line of logic as shorting the coil positive to the battery positive. Make sure the current getting to the coil can get back to ground. Do not connect the coil negative to ground! Rather jumper somewhere near the distributor to ground.
4, double and tripple check that it’s not vapor lock, it sure sounds like it to me, but if fuel squirts out the accell pump immediately after it dies then it’s probly not that, but it could be as some have suggested, fuel boiling over in the bowls.
5, snug up the intake manifold bolts, because grasping at straws.....
If I read correctly, you have had at least 3 coils and 2 different distributors in it? Kinda makes it hard to point the finger at spark being the issue. Assuming the coil wire to the distributor has been replaced also?
Fuel pump acting up? I recall one old car I chased my tail for who knows how long on a somewhat similar problem, acted all kinds of weird when it was warm, intermittent though, would run good for days, then would act up all the time, then fine. It was the check valve in the fuel pump, had come loose .
Totally spit balling here on all this obviously, so take it all with a grain of salt.