SUBS for F-350
#4
#8
I had a standard off the shelf box with 10's behind the seat on my CC 05 Ford. I cut a piece of the liner out where a molded bump was (it was for the electric sliding rear window which I didn't have). It was easy to do, unbolted the rear seat and slapped all the goodies in. Good luck to ya.
#10
I have an 8" loaded pro-box that I'm trying to sell that I can just about guarantee you will blow the 2-10's out of the water....