Which Dodge Ram for hauling Flatbed Gooseneck 40' trailer?

None of the dually's. Get medium duty truck like the fl60 or 70. My little babyshaker will outlast any pickup and it will stop that overloaded trailer. A single-screw with real sleeper would make a lot of sense too. Look for a used sportchassis with low miles or one of the furniture type trucks out of hickory NC. Lower cost than a new dually and will work a long time before major work should be needed.

Andrew