I've been around the block a time or two dealing with dealerships and warranty issues when a problem pops up only to have to fight darn near tooth and nail because I went after market on suspension and steering stuff. Got old fast. But I kept doing it.
THIS time around I am not going to be doing crazy mods and really hoping Ford will sell dealer installed 2 inch lift that can fit 37's. Jeep does this and it is very attractive at this point in my life. That way all I have to fight about is how the 37 KM3s really only measures 35.5 and Ford sells 35 as an option so I am right there. Give or take. lol