It'll work. When I put my Sliderz on initially, I moved the mounting tabs out some, so they fit a little better. When I put on the Clayton's, I think I had to notch a small piece of the back mount where it slides up against the frame so it cleared the subframe rail, but it wasn't too bad.
Sliderz install write-up at http://members.cox.net/lbrty9/Sliderz.htm
99 GC, 4.7, 6" Clayton's LA, 315/75/R16's, FIPK, 3 inch Kolak exhaust, VIAIR 450 OBA, front ARB with Warn HS9500, Kevin's Sliderz, full skids, SURCO, Hi-Lift, Xenon's with Kolak harness, more to follow.