I have an 84 Toyota pickup 4x4 and I'm looking to finally drop some money into it to make a nice off-road rig, the only problem is the truck likes to over heat when ever it feels like it, especially in the summer. The guy I bought it from rigged up some electric fan using what looks like a home-made thermostat. So my question is, is there anything I can do or buy that will keep my truck nice and cool when I'm on the trails?