Firstly, welcome to the site.
Secondly very nice F-450 you have there. Gotta say, you are probably the only guy here with a 450...so you might have a hard time getting the info you want. I personally have an '05 F-350 dually, and used to haul a heavy slide in camper, but traded that for a fifth wheel. Hopefully you will hang out with us here, but you may have to look at other sites for info on the beastly 450's. one other site I am a member of, is thedieselstop.com...it's much larger and, being a diesel site, it pertains more to the Super Duty models and I'm sure you find a lot of good information there. Good luck.
The Hauler - '05 F-350 4x4 CC Dually 6.0 Powerstroke
The Project - '90 Ford Bronco 4x4
The wife's - '11 Ford Escape
For every minute you are away from work...you can add two minutes to your life!