Looking at the McGughys 34170 kit that is adjustable. I will most likely start off at 3/5" and then 4/6" or 7" when it comes time for tires. Hopefully that stock 275/55R20's don.t rub too bad at 3/5". Your truck looks badass and is the direction I will be going with mine. Those wheels are one of my favorites and am glad the K2XX.