have you thought about either of these options. already built, ported and already fits behind the seat and both sound amazing. i have heard both in 2 different f150s. and they sound like 2 10s...
Alright so I accomplished the overhead console switch out. It was not super easy but it is doable. I bought the overhead console from a junkyard, then I had to buy a special bracket from cheaperfordparts.com. then cut the headliner a bit. It is harder then you might think.
There are 2 other sub options I would consider over one of the kicker units. One is the alpine type r 8 inch ported box SBR-S8-4 and the other is the JL audio CP108LG-W3v3 8 inch enclosure. They both fit behind the seat with the carpet taken out. And both sound amazing. The alpine 8 sounds like...