Pulley Diameters

Also, I've never seen you say, but does the temperature cool down once at highway speed?

No, it creeps up.


AND......how close is your temperature sending unit to the thermostat? I also am too lazy to read back and see what temperature thermostat you have.......which one is it?

The t'stat is from NAPA and 180*. The sending unit for the gauge is next to the t'stat housing.