I'm not really looking for answers because I don't believe it can be fixed. There's nothing left to do. I just have to realize that I can't go over about 60 MPH. Below that and I can drive all day. Over that and it gets hotter and hotter until I shut it off.

I just had the engine rebuilt for the second time. This builder allowed for larger clearances around the bearings because he thought it was too tight. Doing that did resolve the problem of the engine being so hard to turn over, but not the over heating. I used an aftermarket intake manifold this time that doesn't have the heat cross-over built in. I rebuilt the 3 core radiator with new brass. I used a high volume water pump.

I haven't even reinstalled the AC compressor and I probably never will.

I had the transmission rebuilt twice this year and it still leaks. There's an endless number of problems I've failed to fix after working on this car for most of my life. I literally gave myself a hernia trying to fix the drum brakes because I thought the wheels wouldn't fix disc brakes. You can't buy all of the parts for the front drums, so it was a wasted 2 month effort that cost several hundred dollars. And it turns out that the drum wheels fit onto factory style disc set-ups just fine.