Thanks for the help! Appreciate it. The guy at the yard pulled the cover off for me and looked for numbers. When he called me back. He couldn't find any. So I directed him. To the numbers on the face of the ring gear. It's a 4.10 and it's in an Eaton so I'm going to go pick it up as soon as I figure out how to get there.
Tip for folks looking for a 4.10 gear set for their 3/4 and 1 ton AD truck... Look at junk yards around farming, ranching communities that are within 200 miles of a metro area... Taking stuff to market, picking up stuff.... Etc.. Farmers and ranchers are smart, frugal,people...
Jeremy