The longer bed would defeat the purpose of the Raptor. It was made to be an entry level starter kit for the person that really wants to push it off road and still be able to drive the truck daily. If you really want a fullsize bed and stout off road capabilities, just get a used supercab F-250 with a 5.4. Supercharge it, headers and full exhaust system, programmer, fiberglass the front and rear quarters, long travel shocks and at that point you'll be about as capable or more as a Raptor and still be under the 55k water mark. Probably more things to do but that is the start. My .02