The pinion gear is pinned to the propeller shaft and thanks to Keith Hardy the rear axle overhaul booklet is available online here:

http://chevy.oldcarmanualproject.com/booklets/5212mts00.htm

I farmed out replacement of the bushings and gear setup as I found a local guy with tons of experience and the proper tools.






1952 1300 Canadian 1/2 ton restomod
You Tube