Does anyone think it is the radiator besides me?

You need to do a temperature check of the radiator using an infarred gun. As soon as I read this I had the DAH I should have thought of this thought so I grabbed my infarred gun and scanned my radiator. the idea made perfect sense. 45 years old and it had been checked and flushed during the restore. Results were not good and I recored it. Now scanning it the readings look good and make sense. Excellant way to check the operation of a radiator. Here's what I read:

"TEMPERATURE CHECKS
To check the opening temperature of the thermostat, aim the Raynger ST at the
thermostat housing as the engine warms up. The thermostat housing will rise in
temperature as the engine heats up. When the thermostat opens, the temperature
will level off.
If the thermostat checks out okay, make sure the cooling fan is coming on when
the coolant temperature reaches 220 to 240 degrees F. No fan would tell you
there is a problem with the fan motor, wiring harness, relay or coolant
temperature switch.
If the fan is working properly but the engine is still running hot, scan the
entire surface of the radiator to check for clogs. Temperature readings should
decrease evenly from one side to the other on a crossflow radiator, or from top
to bottom on a downflow radiator. If you find an area where there is an abrupt
temperature change, the radiator is plugged and needs to be flushed, cleaned or
replaced."