Just a FYI and some thoughts.
I grew up in the days when you used lots of 180 degree thermostats and I rebelled hard at 195 ones for many years. To begin with, actual engine temperature usually runs some ten degrees over the stat opening temp, or 190 for 180 stat, and around 205 for 195 stat. Of course it can vary.
After running modern PCMed cars for many years I've changed my view on that. Why? Look at how long the cars last now, they go forever. While a lot of that can be attributed to the PCM now controlling A/F better to lower fuel in oil to wear engine less, a lot can be to the modern engines using higher engine temps too. Many use 195 stats now and engine normal temps of 212+. My Contour and Focus cars don't even think of turning the radiator fans on until 225 degrees now. The actual controlled range of engine temp is about 200-205 to 220-225 or so by laptop OBD reading program. Water boils at 212 and engine temp needs to get to that and stay slightly over to remove water. The PCV system does it and most engines now have more PCV sweep volume than older ones did. Water vapor left in motor is a requirement of the acid production process that makes sludge, with no water, sludge buildup drops dramatically. Look under the valve covers of any modern engine that has had oil changed in any kind of a regular way and you see almost dead clean still silver surfaces almost like the car is 6 months old. Even at 200,000 miles. You NEVER saw that low an amount of deposit on older engines.
Now, once the engine temp gets run routinely higher, then a need to regulate it closer since any slight overheat can quickly blossom into a full meltdown. On the cars now, the low fan comes on at 225, and then if nothing cools down the high fan goes on at 235, or a backup system if something starts to go wrong.
Engines actually make more power slightly hotter, proven many times, the oil actually has less friction at higher temp as well. And now it's turning out they last longer running at higher temps too.
I myself would be looking for getting that same slightly higher temp range on an old school motor too, they should last longer doing it. No more 180 stats for me ever again.