There is a very inexpensive kit on Ebay. Anybody familiar with this one?
http://www.ebay.com/itm/mopar-8-3-4-dana-60-rear-disc-brake-conversion-/230575563732?pt=Vintage_Car_Truck_Parts_Accessories&hash=item35af5fe3d4&vxp=mtr
I'm going to send them a message and request install doc or more...