So the PO of my 82 720 2wd welded the rear diff, I have searched for possible swaps but I won't have my welder back until late summer sometime. I know the 4 runner will swap but requires me to fab the 720 chassis, I just need a direct swap. clearly I would want another 720 rear diff, but sadly my local yard has none. They do have an abundance of d21's, will the axle just bolt up to my truck? Thanks all in advance :-)