What are the differences between the front axles and rear axles of the single rear wheel 3800's and the dually 3800's?

Did the front axles have a different hub, or was it the same axle as a single rear wheel 3800 but with an adapter bolted on to move the mounting surface out?

I'm also curious about the rear axle. Was the hub the only difference, or was the axle narrower or wider than the single rear wheel version?


Liquidated my projects
Now looking for a decent '47-'55.1 3100, 3600, or 3800