Can use some Thermostat and Rad Cap advice

If you find that your engine doesn't have a t-stat yet it idles at 200 f that's proof right there that the cooling system is working as it should. (Unless you have another issue as mentioned earlier and is minimally capable

The t-stat ONLY sets the MINIMUM temp and has nothing to do with the running and idling temp unless the outside air temp is really low.

If the state is 160 deg it is fully open at 200 and has been for 40 deg.

If it's a 180 same thing and has been for 20 deg.

If it's 195 it is still fully open BUT when you start to drive the air cools the fluid and the thermostat will start to close and regulate the engine temp to be no less than 195.