hey, that looks like almost the exact same dana 60 that I found in the JY. Good news is, its a d60. Bad news is, it has the external hubs. From what I have researched, the only new hub you can get for that is the MM Selectro brand. I have not heard many positive things about the hub. However, you can covert to GM SRW bearing hubs, but they are $$$.
Lucky for me, my stock drive flanges were intact, so I am going to have them broached for 35 spline and run d70 stubs.
One question I have, are all dodge hubs painted white like that? or was it to match white steel wheels? i thought it had something to do with the Sno-Fighter pkg, but I'm not sure. Oh well, congrats on your find.
EDIT: your WMS should be 67.5", mine is. Also, there is a bracket on that central brake line attached to the long side tube, and the hole is threaded and goes all the way thru the axle tube. I thought it was a boneheaded PO steering stabilizer bootyfab, but its just crazy Dodge chit.