ford dually bed

Will the dually flares off like a 2010 ford long bed fit on a short bed single tire bed?

Yes. But you will need to drill a LOT of holes. Plus modify the fibreglass on the drivers side fender to accomodate the fuel door.

You can run 11-16 Dually fenders on a 99-10 shortbed without modification for the fuel fill door.

But sooty is right, if you want the 99-10 Dually fenders, the drivers side will need modified for the fuel door. Unless you came up with a custom fuel door from the inside of the bed...

If I like the 05 four door with the 12 valve I would really like it to be a short bed. It's seems like a tank to turn. Isn't the short bed like 16 inches shorter wheelbase than the long bed?