I have an 07 4x4 LE on 275s. Right now I have 1.5 poly spacers all the way around for a small lift. I would like to go with Bilstiens in the front to improve the off road ride and get 1.5" of lift with out the spacers. Id also like to remove the factory air leveling in the rear and go with Moog springs. Can anyone let me know which shocks and springs I would need?