Someone should buy this and put a CA18DET in there... it would bolt right up to the transmission, clutch/flywheel and mounts that are already there for the CA18ET. I had an S12, it was pretty sweet. Mine had a KA24DE swap though
Not an LSD though... I welded my diff. While it is an R200 housing, it's a long nose R200. LSD's are very hard to find and didn't come stock (on s12's at least).
Good luck with the sale!