72 Scamp and 440

Ive never seen the parts Duster the guy has. But what are the chances it might have Disc Brakes. Also since this is the first mopar ive ever owned how might I tell what rear end the Duster has chances that it could be that 8 3/4. Please post any other items I might want to snag off the Duster. mopars are new to me but I couldnt see my self building a Nova or a Chevelle.