A$$ Backward 203?

[6 Door King]

Figured I'd post this here since it will end up being 6 wheel drive... I am looking to add another t-case to run my two rear axles. The plan is to turn the case backward in the frame so that the original rear output will now be the input from the trans, and the original input will run one rear drvieshaft while the original front axle output will run the other rear axle's driveshaft. Similar things have been done so I feel I can make it work, but I need a few questions answered first. If I take the reduction box off what will end up being the back of the box, what kind of output shaft will I be left with? Will it be a female splined hole or a monsterously long male splined piece with no support bearings. Second, the differential in the case, will it allow one axle to spin while the other goes nowhere? Effectively unloading one axle if it breaks loose? If that is the case it will defeat the purpose of powering both rear axles. If it does work the way I am thinking, is there any way to "lock" that diff to stop this problem? I can see benefits to both situations, in on road driving the split drive speeds could be better, but seeing as I plan to use the rig for hauling junk cars out of the woods I do not want to lose the added drive of one axle or the other. Any help would be appreciated. I"ll add a pic of what I have in mind, hope it helps.