Only problem is the passenger has to go pee alot. Pounding on the bladder like that. LOLI have a regular cab with a 10" Punch behind the seat in a box. I mounted my amp to the cab wall behind the other seat. The box was really inexpensive (I think about $35 shipped) so let me know and I can get you a link. It is built really well. I installed everything myself. Here are some pics of my system.
Dude, the proboxes are not that good and fall apart after awhile. For the money you could get a custom built at a better quality. IMO. Terryprobox has boxes for reg cabs and extended cabs with amps and without hope this helps