Others on the C body site said to preload the bearings (never needed to before) by tightening the nut til the wheel is hard to turn by hand and back off then tightening to spec. I held off on that route since it sounds suspect to me.
That is "close" to the factory procedure. The 66 book says tighten to 90 in lbs (about 10 ft lbs) while turning the tire / hub, then back off and re-adjust. I always as I said snug it up using my fingers on the wrench. You don't need nor want to really really horse on the thing