I have a 90 K5 (currently runnin 33") with 4" BDS lift and want to run 36's / 37's dont want to lift to much higher (maybe a couple in's ). Just wondering if a rear shackle with some timming will work. If so, how much timming? And what about the front lift? New to this whole game, but as mcdonalds says " mmm I'm Lovin it"