Really depend on how you plan on doing the drop...spindles, springs, cut coils etc. Up front for example if you start with 3 inch drop spindles, the oem 15" rim wont clear the lower control arm. You will need to do a 2 inch drop spindle at the most, then a 2" drop coil. You should be able to use an oem 15" wheel, but with a much lower profile tire.