sorry to tell you unless you have an extended cab yoiu wont get three in there maybe two you will suffer seat space but you cant have every thing you could put in three if you went up higher with your box and did away with the 6x9s cutout your factory spots for your 5x7/6x9 to give more of a straight back and build it up you probably wont have room for a large amp under your seat so youll have to make a wall if you go to high with the box you you will lose window space.
yes these are 10s kicker compvr 2ohm in .86 cuft box per sub over all deminsions are 51x14x9 devided into three eqaul parts..8 is minimum requirements it hits 144.9db and i didnt have my amp turned up to extreme max.it hits hard and clean with no problems.boxes are also half filled with loose polyfill.
You need to get registered so we can bash your system, too. He did an excellent job and it probably hits harder than a lot of peoples more expensive systems, yours as well.