I want to level the truck without lifting the rear at all. It seems that most of the leveling kits are a 2.5" front/ 1" rear or something. Is there a way that I can get just a spacer or something for the front without changing any suspension components? Is it easy to install, or do I need special tools to do it? Most importantly, would it void my extended warranty (toyota platinum 6-year/75k mile)?