I appreciate your response, I posted the inquiry about the rancho 9000's back in feb or march.I bought them also, for my '99 1500 Silverado.I still get the bounce on cement highway(that has seams in the concrete).My front ones are set@4, and rears on 1.I also bought a set of velvet shackles($159), have'nt installed them yet.They replace the solid metal bracket(shackle)that the rear of the leaf spring connects to.the front of the leaf spring connects to the frame.according to the velvet shackle manufacturer, the leaf springs are'nt used by the suspension too much, unless you have a load in the truck bed.The velvet shackles are like a "V" laying on it's side. They absorb the up and down movement, as opposed to a solid bracket that does'nt absorb anything.here are some links if you want to just read about velvet shackles.I bought mine from the 1st link(LORD):
http://www.lordcorp.com/DesktopDefau...des.html.Other than the bounce on cement highway, the truck rides pretty nice stock.Good Luck....silverado-99