I've got 9500 miles on mine and no issues. My buddies at two shops told me to wait until the stock idler/pitman arm start to rattle then replace them with the Fabtech parts. I checked them a few weeks ago and everything was still tight and looked good, so I leave them for now.
Chris
With the congito kit you have installed those parts wont wear out. Eventually the totall assembly may need replacing but no sooner then should be expected from a properly working pieace.
By the way i like your truck thats a good looking ride. Are those kings installed on your truck? How do you like them?