Mine are boxed as well.
I personally don't think you need to go as far as having traction bars in your applictaion w/ nitrous. You're not (shouldn't) going to spray in 1st gear for the simple fact that if the car bogs, BOOM!
Your launches can't be that hard or your going to snap axles unless you dish out the $1500+ for the stage 5 axles & hubs. For that money I would have looked into a real stiff spring/strut combo in the rear to keep weight transfer down on take off where your traction problems really exist.
But if you also like the twisties I can see these as being a plus having. Good luck w/ them.
