System in an F-150

I have three twelves and 4 amps (3 of which i'll need), and a capacitor. How would i go about getting all that into an extended cab (not supercrew) F-150? would i have to take out the back seats?
thanks

i have a custom box that takes up my whole back seat that has just one 12 in it....the box makes it loud as crap but i can just take it out if i ever wanna wheel with some people in the back or if i need to drive some people some where....not a big deal...