New Dana 60 Help please

By the time you set this rear up to fit your Duster, with the time & money you will spend, it will be cheaper to buy a brand new unit, ready to bolt in Dana 60 OR 8 3/4" rear with what ratio you want & a Sure Grip unit right from Strange Engineering or Moser. I did. With Wilwood disc brakes & all. It was under $2000 delivered. It would probably be worth it for you in the long run.