Hmmm. starmilt you are correct. the rear hub does not stick out 3 inches. So by your statement you are saying that there is likely just and adaptor to add the second wheel? would the rear end have been changed at all?
i am wondering becuase my intention is to put a slide in camper on the flatbed, then moutn storage boxes along the sides. so, should i leave it as is or try to get it back to a SRW with a flatbed and camper. i looked up the vin# and it said the engine is the 351, M i suppose. do i need the dually for the weight...or are there any advantages to going back to a single rear wheel? again...im not familar with this stuff. i just sold a 99 f150 with over 200K miles tha ai drove daily since new to buy this and a camper, so i am walking backwards in time, and knowledge, so forgive any over simple questions.