If your air temps are 83 and 76 your snake will he fine. That is as low as it should get though on the cool side.

I personally would not let the top of the hide reach over a 100. What I do is use a che on the warm side and then have another heat bulb on the cool side in a low wattage for just a tad of extra heat.

Also covering the sides and back with foam, thick paper, etc will insulate the tank and raise the temp a few degrees.