Like others have said you should be fine runnin 31's stock, but if you are lookin for some extra lift I would just spend the money now and get a nice lift, but if that isnt an option you can put a 3in body lift on and clear 33's no problem. Just cover up the gap to make it look nice.

I have taken the carpet out of my rig and put in Hurculiner bedliner. It is very easy to do and you will be amazed at how bad the carpet you take out smells. Oh and there are already drain plugs in the floor for ya. Makes clean up REAL easy. <img src="/forums/images/graemlins/kewl.gif" alt="" />