Selling off an extra from my parts pile. This is a mid-70's 14-bolt rear from a running and driving K10.
Drum brakes, semi-float, supposed to be a 4.10:1 R&P. I don't see a tag on the end, so I believe it's an open diff. Spring perches are set up for SOA.
This is a tough piece of iron that's an instant upgrade for your crawler, and cheaper to build up than OEM Toyota stuff.

I'd also consider a trade for an IFS Toyota steering gearbox in good shape, or the right D44 SAS parts for my application.
Part is in Sonoma County. Willing to deliver to Sonoma, Napa, Marin, or Mendocino County for $100 extra