Well, the nice thing is that the gearing is probably different than what you have, but you have a two wheel drive truck so who cares. Check the ratio though, that dually may be a 4.11:1 and you definitely don't. Other things to check, spring pack width, driveshaft connection to rearend, it shouldn't be different, but check the distance between spring packs. What are you going to do with the front of your truck? If I remember correctly, the fronts only use a bolt on spacer to move the wheel mounting surface out to match that of the dually rear. That may just bolt right onto the front of your truck as it is. This is just by thoughts... I'm sure there are those more educated than I that will hopefully chime in. Good luck.
'02 F-350 "Babe The Big Blue Truck" 4x4, Ext. Cab, 8' bed, SRW
DP-Tuner 80T, 160cc single shots, GTP38R turbo, Ceramic coated IH up-pipes, coolant filter, 6637, DIY exhaust brake, openair CCV, propane, SBC DD all ceramic clutch, ISSPRO EV boost/pyro/HPOP pres./rear end temp, 4" lift, traction bars, 255/70R22.5 tires, York air compressor, 16 flashy lights, 12 strobes, 12 switches on console, 9 switches on the dash, 7 two-way radios, 5 air horns, laptop, siren, 105 gal. in-bed fuel tank, Kennesaw Mountain front bumper
'86 H-D Sportster - 16" apes, custom paint, custom pipes to fishtails, single fire ignition, leather saddle bags on custom brackets, bagger fender, solo seat, home made luggage rack, all LED rear lights
'66 Bronco "Big Little Monster"