Thermo fan... f@$k all the thermoswitches and stuff, just wire it to your ignition. I had mine wired into my ignition, so it was on whenever the car was on!! I too the front fan off my engine, and only ran with the thermo fan. No problems, easy, and no forgetting to switch it on or off!!
My Corolla just had a 32/36 bolted on, and so far, so good!! Not sure on what jets, not sure on fuel economy... but it is a little bit faster than it was, and hangs the arse out better!! :P