Rear shock hack job

[RBW]

I've attached pics of the rear shock mounts on my '62 C10. There's been quite a bit of modifying done by the previous owner. I've been told the Diff might be out of a Blazer. The shock mounts are some of the shabbiest work I've ever seen. The basic location seems ok, but I want to cut all of the PO's disaster out and do it right. Any suggestions for top and bottom mounts would be greatly appreciated. As you can see, I'll be starting from scratch.