I'm not into 4x4s, but if a 4x4 doesn't use an obviously different case, the transfer case would be attached instead of the short tailshaft housing.
Here is another reference to "short" 727's used in trucks and motorhomes.
Scroll down to the 727 section near the bottom.
http://www.ccr4x4.com/Transmission.htm
As for the short 727 trans I had in one of my old trucks, they were 2 wheel drive versions.
