When I was messing around with the my rough autocad, messing with the design, I found that a really small spindle caused some drawbacks. Now I didn't have really any measurements to go buy when I was guessing at the height of the yota or mII spindle.
The issue I noticed though, was that for one the lower arm is going to have to come up higher, obviously. This could mean a good amount of notching into the frame in order for it to clear. The next issue I saw was that now the uppers are fairly low when laid out, this is good for camber obviously. However, if you go and try to lift it very much and they too will bottom out on the frame.
As for the spindle/ball joint flip that is done to the explorers
commonly:sorry for the huge pic, but that doesn't seem safe to me. That guy is running an 18" wheel and still only has that much clearance. The lower control looks cut to shit and back. I'm sure you could brace it up, but I'm not a huge fan of that tactic.