http://www.fullsizechevy.com/forums/showthread.php?t=1862750

Can't beat the price! 3.42's in the truck arena are frowned upon. So they come cheap....

Randy's Ring and Pinion sells install kits for used gears for good prices too...

I'll give away my 3.73's for my Suburban 8.5". But they are worn and may not be able to be used without howling.... But the awesome price!