8-3/4 Pinion Nut Torque???
If it has a 489 case you tighten it to a rotating torque of 6-9 in-lbs for used bearings, for pinion only total preload with ring & pinion 30-35 in-lbs
read this
https://www.hotrod.com/articles/ccrp-1006-mopar-83-4-inch-rear-axle-assembly/
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