The complexity bugs me, although with the driveshafts all aligned on the same plane, it is probably less of a problem than if any of the components were moving relative to each other (although there would likely be some movement as the frame torques).
I'll have to play with some ideas and get measurements. Perhaps I can locate the transfer case right under the driver seat - that would lessen the clearance issue, depending on the seat I use, but that still doesn't help me with the actual driveshaft.
Luckily, I'm not too tall. I may be able to get away with raising the seat up a bit and then I could raise the floor as well without having to raise the entire body to clear.