I have a 1999 F250 V10 that could pull the BP with the 5075E on it, but I'm impressed by the Ecoboost.
I searched long and hard for a good used Ford or Dodge V10 or a 8L GM for their rated towing ability and only ran across one Ford V10, as I recall, and it was too worn for my needs. So I ended up purchasing a new Ram 2500 diesel. Like good, used, heavy duty farm equipment, it is difficult to find big block pickup trucks used for a reasonable price. I would seriously consider keeping that V10.
I seriously considered purchasing a 1/2 ton Ford EB but they would not deal much at all. In the end I really questioned purchasing a HD 1/2 ton to pull 11k+# trailer. So I bought my loaded Ram 2500 diesel for $6k more and got the stronger chassis, brakes, engine, rear end, transmission, etc, etc. And it is rated to pull 17.1k# on the bumper with no WD and came with the goose neck/5th wheel package and all of the other heavy duty goodies.