Thanks for the info, pics and links, Biebs!
My point in posting was to show guys how to do a super cheap limited-slip drive system that anybody with good mechanical skills can build. Good for a hack rig but also applicable to any other 3-4 wheeled vehicle. Also total horsepower doesn't much matter as long as there's room for large enough clutch plates. Full time 2WD can get pretty weird and at the worst times too.
I've received a whole bunch of tech info and much more for free from the internet so this is part of paying it back. Hope guys get some good use out of it.