I replaced my Rancho 5000's with 9000's this week. Don't waste your money on anything less then the 9000's on these heavy front end trucks.

At first, I set the 9000's on 7 on the front and 5 on the rear. The truck did ride better, but was still a little too stiff for my liking, so I changed them to 5 on the front and 3 on the rear. Much, much better for an unloaded ride. Even my little ole' wife could tell it rode smoother.
The next time I load it up, I'll jack them up and let you know how they do.