I bought a Dana 70 out of John Deanna old duster, it had 6.87 gears in it.
I swap them out to a used set of 5.38 ratio out of a Ford truck Dana 70 that I had swap a set of 4.10 into for a friend. That truck was a 1960 one ton ramp truck that had a 3 speed over, direct and under drive auxiillary(SP?)also known as a Brownie in line tranny.