okay so I have the basic frame, bottom, sides, front and back all together. comes to 9.875 cubic feet

there are 2 Kaption spl 1500's going in and they each get a kaption 700.1 for them. they will be firing upward in an '89 GMC Sierra extended cab and it will be geared for SPL competitions but also daily driven. port size is what I want to figure out so that its still listenable on most songs but be able to hit some decent numbers.

the truck was ripped apart and sound deadened yesterday and started on the box. we need to finish the box tomorrow most likely so some fast help is needed. thanks all!