71 K10 rear axel housing identification

[franken]

Try googling 71 k10 diff pics... Compare pics on the internet to those of your diff.
The internet is your friend. You can ask it stuff and get get answers to any question in a fraction of a second. Then, if you want to ask a more pointed question you can, and use better/narrower search criteria.
I wonder why this is still a mystery to so many... Get answers instantly, or get answers after hours, all of which are questionable until verified.