The axle is open knuckle off of a 1971-1972. I meant to note that the hubs are the external type, and they are leaking around the base seal (metal gasket), which is where the white ends in the pic. I took a closer look at the hubs and noticed that almost all of the bolt flange areas on both hubs is cracked... I have attached pics, but it is a moot point, I have orderd a set of Warn 9072 off of ebay for cheap :-) Here is a pic of the current hubs, for those that are curious.
Pic of New...
