Evans waterless coolant

Timing: I have plotted out the timing curve and replaced springs in the distributor to allow more initial advance without increasing total advance.

Plugs: I have already dropped two heat ranges (started with NGK 7 and now at 5).

I called Evans this morning. The guy gave me three options to lower the engine's operating temperature: (1) run without a thermostat, (2) get a bigger radiator and (3) go back to 50/50 coolant. He said if I want to change over, I should drain all the Evans coolant, run a cycle of plain water through the engine, and then add 50/50. I believe the Evans coolant shouldn't be simply diluted with water because it doesn't have the anti-corrosion additives that regular antifreeze has. Those additives aren't needed if there's no water in the system. I believe that's why Evans says the limit is 3% water in their coolant.

I guess the Evans would work fine for me if I had an oversize radiator. But I'd rather change coolant than radiator.