74-76 cool side is just perfect. Just a reminder which I'm sure you know, Kinsnakes like to burrow and UTHs can get over 140deg without a thermostat.
I have two thermostats on my Kings. I keep one the UTH set for 85deg for belly heat and to keep the bottom of the enclosure warm. The other I have on a ceramic heater set for 90deg for warm end heat.
EDIT: Hydrofarms are VERY good mid range thermostats.
Hope this helps.