Do yourself a favor and don't waste your money on the fan setup if you haven't bought it yet. I bought the radiator/fan combo and when I got the fans I had very little confidence in them once I installed and wired them up. They looked really cheap and seemed like they could die at any time. I ended up getting a Taurus fan from Amazon and hit the junk yard for a OEM fan controller from a Volvo. I have way more confidence in an OEM setup over cheap aftermarket. That fan and controller rocks and I can let my 383 idle all day in my driveway in Texas heat. It will cycle on and off as long as I leave it running. That setup was less than the Champion fans and shroud and works much better.