The subs and ports have 150ish sq inches of area, and the cutout has 190ish sq inches of area. It sounds very good. Alot better than it did in his Grand Prix with a box 1/4 the size and ported as well. The boot is covered by the factory panels in the rear, the second and third to last pics is how the back looks completed. Pretty much stock loooking which is what he was lookiing for.

As for the box being held down there is the steel L brackets that you can see in the last pic. It has that one piece at the back with some black anodized bolts through the bed, as well as a piece on each side that is also bolted through the box. It is very solid.

 

Bed Liner in a can, $8.99 can at Canadian Tire. He has a tonneau cover as well, it was just off to make the install easier.