I decided to go ahead and take the bed off today. It was kind of a pain doing it by myself, but I finally got it done. Looks like I've got some more body work to do on the driver side as well. At least it'll be easy to get to now. It's also time to order a new rear wiring harness for it. The PO cut the wires in order to connect them to the Mustang tail lights. I guess I should be thankful. Question though, is plugging the new harness into the plug in the rear crossmember all I'll have to do?