This is why I love this site. If I have a Q, I look around and I find it! I have an '06 F-350 Lariat CC 4x4 PSD that Im looking to upgrade to some beefy A/T's and was not sure what the max size I can get on there with the stock height. So I look around and what do you know it, Marv's got the answer! Awesome, and Georgous truck!