Yes, a 14B is known as a "trencher". Off road folks usually take a grinder to them and clear off the lip on the bottom of the casting.
The early 14B's are the same from 3/4t to 1 ton.
The later model trucks introduced a 1/2 and 3/4t 14B Semi-float. Uses a smaller ring and pinion, C clip axleshafts and of course isn't a full floater axle. It also has a smaller "pig". Also available with 6 lug axleshafts in the "heavy half" 1/2t's.
More on the 14B:
http://www.pirate4x4.com/tech/billav...ble/index.html