Well I picked up some proper size speakers for the rear of my truck. Some pioneer 6x8's. An odd size, but the old F150, seems to require odd speaker sizes. Im currently using my Xplod deck and door speaks and Pioneer 6x4 rears. I plan to move the 6x4's to the front and place the new ones in the back. Next step will be to replace the head unit with a more modern Pioneer deck, and as always, still continuing my search for a 10" shallow mount sub for behind the seat.