W/a bench seat you might check out this set-up
http://www.pirate4x4.com/forum/showthread.php?t=916481, the 3 shifters are located on the front case, w/levers that operate the 4H and 4L functions of the second case.
I modified the front shifter, so it could be located next to the rear case case shifter, for a little cleaner look.
The shifter only has to move forward and back, not to the right and as well, so I don't know how that extension would effect the amount of space the shifter would have to move to engage 4L, 4H wouldn't be a problem. A short through shifter kit on the second case might reduce the movement enough to not have the shifter end up in a position that gets in the way.
