Rear end problem help

So i was confused about who i got it from i thought it was the same shop but i bought it off a ebay store name nine inch nodular. Im guessing he does a lot of ford 9 inch as well but doesnt have a single bad revieew and all good reviews since 2005 so im waiting for a reply on what to do since right now im dead in the water and got to waiti till wenesday to remove the pumkin.