It's not anywhere near perfect, but here you go:
The idea came whilst looking at the Warlock & LilRed's on Google, and how it might relate to the 2013 m/y.
The thing both of these trucks had in common was a step-side bed. Therefore, that is what I made. Starting with adding the dually-bed to it & then modding it from there. Now, Obviously with the exhaust routed that way, the filler isn't going to be right there, I just didnt' feel like moving it. LOL