From a "fast car" point of view, like a couple have said before, if you could get the AWD to work with a built LS1/LS2 and then twin turboed the engine, damn what a weapon that would be!! Lighter engine, better weight distribution, and being able to make 400-500rwkw with bugger all lag. I doubt many RB26's could keep up with it, regardless of how much power they had.
But yeah, i still personally wouldn't do it......................... But i think some one should