I have 2 good used 3.54 diff gear sets that I removed out of my D1 diffs free to a new home. You pay for the pick up and packing or else they go to a scrap metal dealer.
I have complete diffs with springs front and back for a 1969 Series II A SWB 88 for sale $50-00 each they need pinion seals you collect in Warrington PA.

 

Right going to Savannah GA for 2 weeks for work so the above parts will be available until then. Then the parts will be dumped at a scrap dealer when I get back I don,t have the place to keep them.