Here is our 2004 CTD. I went with the ProComp 3" kit in the fron and the back is stock. The kit comes with the MX6 Adjustable shocks. The tires are FC II 325\60\18 (33"x13.5 wide) the wheels are 18X9 with 5.75 BS. You could get away with 6" BS with a 11.5 maybe 12" wide tire. i went with 33" tires for a few reasons, no gear changes, don't need a ladder to get in, off road capabilities, less wear on the drive train. Hope this helps
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http://www.***boat.com/image_center/...truck_Side.jpg
http://www.***boat.com/image_center/...7truckrear.jpg