My dad had a '64 (or so) Chevy station wagon, and it never did not run hot. I recall pulling over at the bottom of the Grapevine to let it cool, and on the way home from Wyoming (1967) we pulled into a Sinclair station (I remember the dinosaurs) for help.

I'm getting tired. In Seligman now. Headed out in a little bit

Boundless energy!