Here's the excerpt from the 1954 Chevrolet Truck Shop Manual, Page 4-3. It's talking about the axle spacer or block that the spider gear shaft goes thru. The thicknesses you mentioned earlier in the thread, Carl, refer to the block, not any shims.
The 1948-1951 Chevrolet Truck Shop Manual says exactly the same thing.

The bearings and washers have nothing to do with the axle clearance.
Attachments
Axle shaft spacer.jpg (40.13 KB, 170 downloads)


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.