I have 4 memphis pr 10d4's and i want to put them in my ext cab ranger..im willing to use up the whole back portion of the cab behind the seats...my usable area is w40''xh20''xd1.12''xd2.20'' ------------------ from memphis's site: 2.50 / 35 / 10.5 x 2 x 19.5 (airspace/tuning/port dimensions- height,width,depth). this is 2 subs per chamber....any help would be awesome!! thanks alot in advance!!