Heat Soaked Starter

Earlie,
You are getting ahead of yourself. I don't what the hp rating of your starter is, but many factory starters were ~ 0.9-1.0 hp.
When I read post #1, I thought [ maybe mistakenly ] that the starter would not crank or was slow to crank when hot.
Post #36 suggests a sol or wiring problem. You should hear a pronounced 'click' if the sol is working. No click means it is not working. Try bridging the 2 terminals on the starter. If no start, it is the sol. If it does start, it is the starter relay [ not sol ] or wiring. If the car has NSS, make sure that it is working.
Report back with results. A Ferd fat, ugly, heavy sol would do nothing to fix this problem. There are more modern pieces available if needed. A lot of people do not realise that the F sol was used on a particular F starter that did not have a sol attached to the starter. That is why it was so big...