If youve got the third row seats and the 40/20/40 triple folding seats, pop out that tiny center seat, and drop 2 or 3 subs... ive got 2 10inch subs in a HUGE ported box, and with it in the middle like that, it shows off the subs nicely, sounds amazing, and still seats six comfortably, and then drop your seats, and youve lost almost no cargo space...
also for door speakers, get em from crutchfield, they give you and adapter that works perfectly with ford wiring harness...
and door panel removal, also easy, pull out panel behind door handle, pop out window switch pannel and disconnect wires (thats the tricky bit those connections are a b!+(#... undo bolt behind it, and two on the bottom, pull up on panel, and remove... on the drivers side, theirs the connection for the mirror switch watch out for this... trust me, you need minimum 2 people to get that connection out...
speakers size is a 6x8, and with an adapter plate you can uses smaller speakers...
if you are doing a new head unit, have them run a wire from the ignition on wire that turns on the radio to behind the golvebox... you dont need to connect anything yet, but latter when you do, you'll be so glad you did... saves pulling the radio back out to add screens, lights, or what ever you want to add... Mini fridge maybe
also under the hood, a great place to connect the subs power wire is on the bolt under the fuse box cover...
PM me if u have any other questions... i may or may not be able to answer them