Do it, you will love the boost. I would not worry about the summer heat at all. I have never had a problem with heat in any of the vehicles I have supercharged. Just put in a 180 Tstat, and modify your fan settings with the Predator.
Mine runs cooler now than it did before the supercharger. With the intercooler in the manifold, I can drive for a hour, then open the hood and lay my hand on the intake and its only luke warm.