The splined hub adapter nuts should be torqued to 70 lb-ft and should not be reused more than once. I removed and reused those nuts too many times before I learned better, and once when on a road trip the left rear wheel loosened up and caused the rear end to feel a bit squirrely. Fortunately, I got off the road and stopped before it really got bad, but still some of the studs had been worn and necked down by the edge of the holes in the hub adapter by driving with them loose. I had been torquing those nuts to 40 lb-ft.
No torque was specified in the shop manual, but I had access to a materials lab at work and had them test the studs. They were equivalent to Grade 8 steel bolts in hardness. Standard torque tables for Grade 8 steel bolts of the size of the studs give a maximum dry torque of 78 lb-ft. After replacing the nuts and damaged studs with new ones and and torquing them to 70 lb-ft, I have never had them loosen again. To make sure, after torquing I painted dots on each nut and the corresponding surface of the splined hub adapter with nail polish so I could see through the spokes if any of the nuts had moved.
Locking compound isn't necessary because the nuts are self-locking. That's why they shouldn't be reused more than once.