has anyone tried this on a 4x4 (the type that a 95+ Sport has where youre always in auto 4x4 and can force it into 4 high or 4 low), is it even possible or would it damage some components/mess with the computer? I was just looking at how the rear wheels are tucked so much further in than the front and how nicely a wider rim would look back there.

It shouldn't be a problem unless you change the height of the tires.....:)