i am about to put 2 inches of lift on my 2005 z71 crew cab. first how many tires will i be able to use? Im guessing 33's should be fine? Also i currently have 17 inch rims that i want to replace. Should i stick with 17's? Is it possible to go down to a 15 inch rim on this truck or would it look awful/hurt the truck? Im trying to save money where i can.... ideas?