Gerald,
I don't think you'll have a problem if you put in a 195 t-stat and try it. I run 195's in all my vehicles and also use an electric fan setup with the 292 equipped '63 pickup. The controls are set to turn the fans on at about 220 and turn them back off around 185. And running the truck during the summer here in the Phoenix area means the fans are on almost all the time setting at stoplights. The "tell-tales" that the rebuilders use won't do anything until about 260 to 280 degrees. Basically an engine won't get that hot unless you are running it without coolant.
If the 195 doesn't change the temp that your engine runs at, then get back here and let us know.
------------------
David
newbie #4153