2001 ford f150 crew cab.Im removing the 60/40 rear seat in my truck and putting 2 40 seats on either side so I can build a sealed console speaker box for two 12"s. I need 1.9 cube ft of room per speaker and im having trouble with a design that will fit all the curves and such from the back of the front seat to the rear wall. I have taken everything out of the back seat area of the truck including the plastic interior.