Not at all. I should have put Kings on years ago and don't regret the $$$$ that they cost... worth every penny... buy once, cry once etc. They ride very well, are adjustable, and rebuildable. For me, that's piece of mind. Buying a decent tire with an adequate sidewall will also help with the ride. I went from the factory 22's to a 17" wheel and man, there is a big difference!
I was flirting with the idea of more lift (4") to be able to clear 37's (with cutting) but without going to the heavens with it. Ask around and folks say you need a 6" lift to clear 35's but I was able to get 305x70x17's clear with the norcal mod and without cranking up the preload (lift) on the Kings. The truck still has some rake, but that's fine with me for now.
Finally did the "Norcal" mod to fit the 305x70x17's KO2's and man, I should have done this ages ago. Was concerned that I would have to pull the coilovers off and crank up the preload (i.e., lift) but the tires fit with no rubbing and the King EXT version shocks are in their sweet spot for both up and down travel.
It rides very different and like a truck should The 6.2 still has more than enough pull to turn these easily but I might look into a tune or even gearing to get some mileage and torque back, and to keep some strain off of the trans. If I can find a decent kit and/or parts, may even build and add a trans cooler.
Next - trying to find a body-matching camper shell, 3M clear film to protect the rockers and paint from the new wheel/tire poke, bumpers & winch, roof racks, lighting, cell range extender, aux fuel cell, dual batteries...