Wow! Completely transformed the truck. It now feels very planted on the road, even loaded and with a trailer behind it. No floatiness, no oscillations after a bump or dip in the road. Ride quality is a little firmer, but still very acceptable, and the truck doesn't have that "heavy" feel on undulating roads, no wallowing or head shaking. Best money I've spent on the truck in a while.
What truck did you put them on? Did you replace the Fox 2.0's in the pic with the Kings? I'm about to go with Thuren springs on my 98 Dodge 2500 and am torn between the Fox and the Kings....
