My rig - 2011 CC 4X4 with ST trim, 4.7 with 3.55 gears. I have the Readylift 2.5" spacers on mine and can fit 385/70/17's (about 34") on stock rims with no rubbing at all. If I did it over again, I'd go with the Bilsteins.
Iron Cross HD Step review: http://ramforumz.com/showthread.php?p=556522#post556522
If you're willing to pay two hundred dollars for a shop to install the shocks but you want to do the install yourself why not just take the two hundred and buy a decent socket set and do the install yourself and you'll have the socket set for the future.