OK, finally got the cable to hook my camera to the computer so I can share some photos.
Here's the NOS left axle shaft with the machined-in race:
Here's my old right axle shaft that has the press on race:
The race OD is identical on these two shafts - they are interchangeable.
Also, George was asking how the NOS axle was packaged. Pretty cool, actually - 70 year old packaging:
http://i456.photobucket.com/albums/...%20shaft%20for%2046%20half%20ton_TAG.jpghttp://i456.photobucket.com/albums/...le%20shaft%20for%2046%20half%20ton_C.jpghttp://i456.photobucket.com/albums/...le%20shaft%20for%2046%20half%20ton_B.jpghttp://i456.photobucket.com/albums/...axle%20shaft%20for%2046%20half%20ton.jpgJust about ready to finally reassemble once I can get to a driveline shop to check balance on them and have the studs pressed in.