Started with a base F450  (thanks to Expendables Modding) and left nothing untouched haha. Thanks to Austin Farmer for the Model I robbed suspension parts from as well. things I have done (wich I know for a fact I will forget things):

-air ride (new sound as well)
-new engine sounds
-stretched box and added 3rd axle
-added ramps
-added more wheel choices (including tracks)
-customized interior
-custom paint choices
-custom headlights and taillights
-custom front and rear bumper (front bumper modeled after the Aplha series bumpers)
-working log winch (color matched hook)
-animated suspension parts
-smashed ALL errors
-probably a lot more that I can't think of haha