Looking at the Rear Pinion Bearing and hole photos .
The bearing you show in one of the photos should tap in fairly easy.
That is a neat photo because you can see what I believe is the oil seal way down at the other end of the torque tube.

Your last post showing cast number GE 2 09 is from a 1949 1/2 ton truck. 1949 rear axle pre-fix or cast numbers
It says GE Detroit regular
G = 1949
E = 3100 regular rear axle
2 = 2nd month = February
09 = 9th day = 9th day in the month.
February 2nd, 1949 > Date of Assembly in Detroit

All I can think of is:
Its the wrong brearings
There is another carrier from a different year that uses the same cast code.

You can try to give this guy a call,
Northwest Transmission Parts, Ask for John 800-327-1955
http://nwtparts.com/ He knows a lot about the parts on these old trucks.

Keep me posted on what he says.

1954 Chevrolet 3105 Deluxe Panel Truck
w/Factory HYDRA-MATIC