Nice. I've got a similar style flatbed, and I positioned my backup camera about 5-6 inches forward of the rear surface [your truck has that black/gray plate over where mine is mounted], and with it's wide angle lens I can easily see the hitch for lining up to a trailer and also left and right to the width of the bed, so I can back up to within a few inches of other vehicles/lamp posts/whatever. Only thing that causes me a problem now is if I have some equipment that sticks off the back a little higher up.

Wire the camera and test what you can see with the camera in various locations before mounting it permanently.