I've been running that same suspension for a year now (21k miles) I installed the Icon 52700 rear springs to match the 2" lift in the rear. They made a HUGE difference supporting a heavier load in the back. Unloaded, the truck has a slight rake. Just for reference the only other mods I made to...
I was able to get those top nuts by tapping the wrench with a hammer a few times. I used the loaner spring compressors from auto zone; not easy but was able to get it done. Having a breaker bar handy was helpful especially when it came time to crank down those springs
