I'd have to say that snakes are relatively good at regulating their own heat. And many snakes will change their day-to-day actions based on the seasonal climates.
I would be more prone to putting the light on the heated side and adjusting the UTH to accomidate and moving the lamp more and more to the cool side until you get it spot on. But you might want to keep track of it on a daily, or more frequent, basis to make sure your staying where you want to be, as well as your humidity levels.
If you do go through with this, please let us know how it works for you. This would be good information to have for the novice and experienced alike.