Originally Posted by vrodrex

If you plan on towing heavy I wouldn't go more than 2-2.5" in the front and leave the rear alone, other than adding air bags to keep the truck level. Also depends on the type trailer you plan on pulling. My truck is all stock w/ exception of 315's (34.5") and airbags in the rear. I have about 6" between the top of my bedsides and my 5th wheel camper. 6" does not leave much room for error with drop offs, curbs, etc. I couldn't go any higher or put larger tires on as I have had the camper within 1" or less of the top of the bedrails. Goosenecks aren't as much a worry but you still need to consider the height of the bed. Bumper pull trailers you can get drop drawbars (hitch) but they tend to multiply the leverage being put on them (I've bent two). Tractor Supply sells a 6" drop rated for 10 or 12,ooo lbs. It's also tuff to find load equalizer hitches that will work with a lifted truck. If you do a full on lift on your truck, do yourself a favor and get rear springs instead of blocks. As noted in other threads you can run a 35-37" tire on these trucks with little to no mods