440 melt down

This sounds like an electrical issue to me. Primary side. Between ignition sw and dizzy/ECU. Maybe a coil, or a B-resistor, or a high-resistance connection somewhere.These components will need to be tested in their hot condition.And,as always, clean your grounds.
Could also be a starter going bad.

Quick test.
Next time the engine is cold, start it up as you normally do. Let it run for about a half a minute, and shut it off. Turn the key to run, and go have a coffee. About 20 minutes later, come back and attempt a restart. All your ignition electrical components will be fully warmed up. If one of them is/are the cause, it should show up immediately, as a hard start or no start. If it starts right up, its time to check out the starter.