I wouldn't put 10 tons behind a 1-ton dually, even the class 5 trucks (5500/F-550) are only rated to tow about 18,000lbs.
Putting that behind a 3/4 ton is just asking for trouble.
Like the other said. On paper its not legal. Will your truck pull it, sure it will. Many larger trucks using the same 7.3 are rated to pull 20K. Dmace mentioned that even an F550 is only rated to pull 18K. Another post by LBrown who is looking for a truck and trailer has posters leading him to believe he can haul 4K in a 1/2T pickup bed. You just need to do your research, if you know how much weight you are going to pull its rather easy to figure what size truck is needed to pull it legally.
I wouldn't put 10 tons behind a 1-ton dually, even the class 5 trucks (5500/F-550) are only rated to tow about 18,000lbs.
Putting that behind a 3/4 ton is just asking for trouble.
Yeah, might be right. After I read your post it got me to thinking with that much weight braking could be problem for an F-250 under some conditions. I imagine that the trailer / truck weight ratio might cause the F-250 to get "pushed around" a little by the trailer. I live in the Ozarks so my posting was initially aimed more at can I get this trailer up and down these hills (some steep). But I can see there are other issues that need to be thought about here.
You will have no problem getting it up the hill. I tow 25K with my 2006 F-350. The problem is getting it stopped and being legal.
Chris