I think the only person with a Dana 60 here is me Grumpy.
The 1963 Dana 60-2 from a 1963 Ford F-100 pickup.
4.10 gears Dana Track Lock Posi unit.
I have never taken it apart fully.
Removd the Semi Float axle shafts and counted the Splines.
30- spline equipped as The Hemi Mopar Dana 60 passenger car rear diffs.
Its a big super strong rear.
The only rear diff of same build quality and Bullet Proof is the 1957-64 Pontiac 9.3 rear diffs..
Either or rebuilt will take 1500-2000 Ft/lbs input driveshaft torque.
Have a losse 9.3 ring and pinion geaset I can photograph next to a C3 Dana 44.
Size comparison is dramatic.
Dana 60 ring gear even slightly larger.