Thermostats/Flowkooler

Correct, the brass stat on the right is an old 160 , probably made in the USA. Since I filed that housing, no leaks. I am using that modified 195 ° stat in both of my cars.
The '69 /418 and the "72 318. I have not checked them for opening and closing. I did make sure that the shutter was clocked correctly so that the 3 passages are wide open. They seem to work fine.