The starter and solenoid are new. I also replaced the wiring from the firewall to the solenoid. ... all routed through the heat shield tube...and further wrapped with heat sheathing. ... THEN wrapped the starter and solenoid in that insulating wrap...which I had to remove so I could jump the solenoid. When it was happening, the solenoid was actually hotter than the headers.

I’m thinking hard about the Ford type solenoid set up mentioned above...maybe install it where the external voltage regulator is/was.

This all started when I was changing my oil about a month back. The motor mounts had shrunk to the point where the the oil pan was about 1/64” from the cross member. I never had more than 1/4-3/8”, so I replaced the mounts, and added 5/16” spacers made from steel plate.

As these projects usually go...had to adjust the fan shroud...had to remove my carb spacer...them reroute the PCV valve vacuum line rear of the intake... you all know how these things go. Additionally, I had to remove the starter to access the drivers side mount. I cracked the solenoid housing tightening connections...TWICE!... and broke a connecting stud once. So, I’m now pretty good at R&Ring the starter...LOL!

Never had this heat soak issue with the older starter...

Go ahead and and laugh. You gotta it yourself #ome slack in this hobby...