Search moparts....how many more times do we repeat ourselves...................
Some of us run instrumentation instead of guessing so there is real world data. Hi res AF gauges, digital hi res tachometers, IR temp guns etc.
the thermostat controls the "minimum" operating temp.....

At 195- 210 the fuel burns completely and the air fuel ratio is is not bouncing all over because fuel was collecting in the intake due to the engine being too cold.

This has been posted before and now posted again. Actually I must be lucky managing high hp cars that run laps at 195- 210 that never overheated or blew up. Actually we had 2 of those "hot" engines apart for other issues and they were clean and did not have the "cold engine smell" that engines get when run under temp ...must be a mistake

High under the hood engine temps are the real problem not the operating temp of the engine.
The temp gage will show normal but when the hood goes up everything is cooking