Remember to lower the rear tire pressure when going off road for any length of time and of course on the street.
I have almost the same set up and run the rear tires at about 33 psi cold. anything more and they ride rough when hitting the small square edge type of bumps. Now if I was towing I'd air them back up a bit...
BTW - After my install the truck didn't ride rough but the new spring pak felt more progressive, small bumps and dips it moved very much like stock but when hitting the bigger stuff it wouldn't just blow thru the spring pak like stock...
I do need to lower my N2 pressure in my bumps...