dana60 full floater Q\'s ok a dilemma: i have a 68 full floating dana 60 axle im getting soon it has only 1/2" studs i am gonna stick later model 16" duallies on it later model duallies were meant for 9/16" studs what to do ? will the wheels center ok ? wheelnuts to use ? cna i swap shafts for later ones ? did dana60 FF width/length change after 68 ? thanks for anything Randy run it til it breaks, fix it, and break it again!