A rear 60 is about 150 in the Jy they are not hard to find ,a 14b cost the same. Its the front that cost so much ask me how I know. {popcorn}
Richard called him and said its 5x5.5 bolt pattern out of a 1500, I don't think its a 60.
I think those are the years with the REALLY narrow driver side axle tube. Sterling is strong, but parts aren't as common (ie cheap) as for 60s, 70s and 14 bolts.