Thermostat replacement

It's funny that Chrysler had a recommended thermostat style, but they won't fit in the slant 6 unless the thermostat hole is opened up a little bit. lol This is the style I run, but as mentioned, they will not fit without enlarging the hole. It doesn't take much at all, but it won't fit otherwise. I prefer the 160, but that's the 195 in the link, since that's what you mentioned.
https://www.stewartcomponents.com/product/high-performance-195-degree-306-thermostat/