Question about yoke for 8 3/4" 489 case rear end.

[john-9]

pinion yoke nut size 1-1/4 socket fine 29 spline yoke ( 1-5/16 nut fine 29 spline as well ) 1-1/8 socket coarse 10 spline ,, early 489 cases were 10 spline then went to 29 spline as production ramped up.