if built its something like this: from end to end was 48" from floor to top was 27" a 2" ledge on top and a 1" or 2" on the bottom. then the entire box was back was fiberglassed into the truck. the 2 outer most speakers were going to be right up to the edge and the middle to were going to be up enough to clear the center hump.
box is drawn up like this.

would look something like this

2 side panels are glassed in alog with the top and bottom ledges.

when you take away the air space for the hump and dividers you would end up with something like .70-.75 per box. or you could ad bracing and join all 4 subs together in on big box and be set. The seat would be moved forward about 3-4 clicks to clear the 10" gap at the bottom.

I'm really sure I made the box for .75 or maybe .5 cu ft. per sub. I'll have to dig it up. ether way you can fit 4 10s in a toyo single cab.

here is an old box i made. one Crossfire BMF DVC @ 2ohms






then a simple box for 4 10"s in the bed

never really finished it tho,
4 P1 Crossfire DVC's ran in series and parallel to 2 ohms

 

Right on, excellent explanation. Makes more sense now, the fiberglass is key. I'm still gonna say its prolly closer to 2 cubes once you account for everything, depending on the basket and magnet size of the subs as well. If you look at my build thread you can see just how much space the driveshaft hump, gastank hump, and the hump in the back wall takes up. My box is 53x20x7 at the bottom 2 at the top and is barely 1 cube.

Either way I want to see your box built! I like that ported console box, great design.

I read over your build thread on your old truck, do you have a new one yet? Or are you getting one?

 

yes i have a silver 90 toy, but no plans for a system, lol I haven't put a build thread together, but if you look at the "what i did today to my truck" thread, daily updates are in there, lol

 

What subs were you planning on running?

3 or 4 clicks! Hope your under 5 1/2 ft tall.

 

What is the mounting depth of the subs you were gonna use?

 

from all the way back 3-4 clicks forward its not that bad.

 

i don't remember exactly but i think 7-8" I worked at a shop and I had JL, Kicker, Fosgate, Cirwin Vega, and more available to me at the time. i think i just grabbed one off the shelf and took it to the truck to make sure it would fit.
but i never went ahead on building the box

 

Nice. Deep enough to fit a decent sub in there.