I hate drilling into a new truck !
I'm not sure which folding cover I will be going with yet. It will have to have the front panel near the back window that will fold backward with at least a 24 inch opening. This is so I can open the lid to my 60 gallon Fuel/Took Box combo (This will give me about 110 gallons fuel capacity). I think I finally found a company that can build me a unit that will be about 17.5 inches tall (they are suppose to get back with me this week). This will leave me about 2 inches clearance between the box and cover. However it looks like I may have to drill some holes in the bed though for securing the tank, hoses and wiring.

I am going to try to use the pop out plugs in the bed it possible.