1/2 ton and 3/4 ton front hubs interchangeable?

[pwrwgn]

I have a '51 B3C I am rebuilding and a B3B parts truck. Will the B3B front hubs/drums fit on the B3C spindles? I had to swap rear axles as the B3C rear axle was shot and now have 16 inch wheels (as came with the half ton) on the rearof the B3C because my B3C 3/4 ton 15 inch wheels will not fit the half ton axle. Looking to put the B3B front hubs on so that I can run the same 16 inch wheels all around. Thanks for the help! 

Edited November 25, 2017 by pwrwgn

[Merle Coggins]

3/4 ton spindles are slightly larger. Also, the brakes are larger on the 3/4 ton truck. If you wish to do this swap it may be easier to swap the full axle, or swap the full spindle/brake/hub assemblies. I believe the king pins are the same. 

[pwrwgn]

Thank you Merle! Very helpful. I think based on your information that I will check overall health of both axle assemblies. If the overall assembly on the half ton is best, maybe I do a total axle swap. If the overall assembly on the 3/4 ton is best, maybe I just swap spindle/brake/hub assemblies, and replace king pins if they are at all worn - since it will all be apart anyway... I assume sterring box output shaft is same on both? Do you know? Thanks again... Very helpful.

 

[Merle Coggins]

The steering box is not part of the axle assembly