Ford and Dodge Body Builder guides
Not sure if everyone has seen these but it is Ford and Dodge's body builder guides which pretty much gives you answers to anything you need to know about their trucks. As always though, you should take this as informational only and go by the door sticker on your actual vehicle as fact.
And Dodge (there is a link on the page for older trucks)
John & Deb
2011 F250 Lariat FX4 Crew Cab 6.2
2011 Flagstaff V-Lite 30WRLS