Install a torrington bearing in the front side of the rear carrier. There is usually a plastic thrust washer here. Do not use it, replace it with the torrington bearing as GM did on the later model 200-4Rs.
Install the low roller clutch (sprag) and then the inner race by turning. The race should have the splined side up.
Install the carrier into the rear ring gear:
Now you can install the low support onto the rear carrier.