The transmission front main shaft bearing is GM part number 903209, or New Departure 3209.

This part interchange link may help with your quest:

http://www.kakapart.com/oem/partscrossinterchange/new-departure-3209.html


1941 Chevy 1 1/2-ton WW2 4x4 dump truck
In the Stovebolt Gallery
Lots more pictures