I'm scheduled to have the RPG folks install their Stage 3 rear suspension kit on my '17 SCREW in a couple weeks, right before I pick up my new travel trailer at the Pomona show. The trailer's 4,700 pounds dry, so probably 5,500 pounds full of water and junk, which leads to a 550 pound tongue weight. I also want to be able to put a couple of dirt bikes in the bed of the truck, so that's another 500 pounds out of the 1200-pound payload, and the wife + I together ain't 150 pounds!
RPG's suggesting custom Deavers to handle the weight, and I agreed with them until I ran across this thread. Now I'm thinking of going with the +2 Deavers (since I only load the bikes and hitch up the trailer on the weekends—otherwise it's my daily driver) to improve the rear end when daily driving, but getting Izzy's air shocks to handle the bikes + trailer on the weekends.
Does that make sense, or am I missing something?