All right, daily check in.
Took my thermostat out and the JB Weld didn't hold. So i used a mini torch and soldered the hole shut, but the heat caused the guts of the thermostat to rupture making the thermostat no longer functional. It does not open now.
So I installed the extra 80C thermostat I had laying around. It made no difference. This basically eliminates the possibility of my thermostat being defective.
Next, I decided to reinstall the original thermostat that is no longer functional. This thermostat cannot open, it is broken. With this thermostat, I still saw no improvement. The issue is not the thermostat opening or the bleed hole. Obviously the engine is cooling regardless of the thermostat state. My theory is it is cooling like an air cooled engine.
The only thing that ever showed an improvement for me was blocking the radiators which then blocks a lot of air flow that would pass over the engine. If you look at the stock radiator shrouds, they force air through the radiators and then guide the air over the engine. It would be interesting to try a shroud that ducted air through the radiators but then away from the engine.