Which rear axles do you have? I have a 62 W5000 NAPCO, it has Rockwell axles, HHDHDX2 for the front-rear and HHRHDX1 for the rear-rear. My front axle looks like it was built with an Eaton center section. Transfer case is a Rockwell. Pics at:

http://rides.webshots.com/album/227086175ErVbWi

Bob