Yes, Virginia, there is a sway bar. Front and rear. It looks a bar, all bent like a curling bar, which mounts in front to the lower a arms, and in the rear... I can't remember, it's been that long, but it's behind the rear axle, and has a separate linkage at the ends.
If you want your truck to ride softer, I haveto ask... WHY? You claim you have extra weight... an optima in ADDITION to the stock battery, or in place of it? Subs? This is considered extra weight? What are they made out of? The passenger compartment should be able to handle that kind of weight. It should also be able to handle the weight of a brushbar. Your stock shocks are going to be softer than anything that you can put in. Bilsteins offer a stiffer ride.
Then you lost me with the rims thing, why not go with 20"s? Come on!
You sir, are a confused little man......
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The Van LIVES.