A little bad news for ya. The fan shroud spacer isn't going to help keep your truck cooler. I found this out last year too, after I installed my 3" BL. I ended up buying a new radiator, fan, fan clutch, tried 2 or 3 different thermostats, and driving down the road it stayed cool, but as soon as I went offroad, it would start running hot. The problem is, when you lifted the body, the radiator went with it. Now your stock fan is still in the original location, making it to where it only blows on the lower half of your radiator. Time for some e-fans.