Ok so I want to put a new rear emd in my 2wd with lower gearing instead of paying to refearcwith labor and all. so say i find a 6 lug 10 bolt at a junk yard can i switch just the shafts out back to 5 or is it impossible. i know just swirch rims but i love my rims and don't want to switch them or buy new ones for that matter. So any possibilities with just switching axle shafts thabks