Reply to "Cannot find temp rating on thermostat"

Not too important. In my experience, what temp thermostat it is makes no difference in how hot the engine runs once fully warmed up. A 160- thermostat opens quicker but runs at the same temp as a 180 or the now-rare 192 after 15 minutes or so. I solved my special Cleveland thermostat problem decades ago by blocking the recirculation passage in the water pump and the brass washer under the T-stat and use a 351-W (or 302) thermostat. Works for me....