If you want too much power and too much traction, just unbolt your diff and send it to Gary on VM along with too much money.
![Judge](images/smilies/judge.gif)
I think he does the 12 bolt conversions for like 3500 out the door.
Or you can do them yourself. Just takes some grinding and some machine work, and a lot of patience. Which I'm sure is something I'll be doing in the next few years.