ok, you need an engineering degree to answer this one, but I'll try to remember from what I was told (BTW, scott at rockstomper is really good at this too, he built his own control arms for his long travel IFS toyota).

you can get more :edit: equal (meaning less wear on the tires, keeping them flat) :/edit: travel out of unequal length control arms. <img src="/forums/images/graemlins/smile.gif" alt="" /> see there you have it. <img src="/forums/images/graemlins/confused.gif" alt="" />

hehehe, I'm not qualified to say anything past that <img src="/forums/images/graemlins/wink.gif" alt="" />