Does that Exp have independent rear suspension (IRS)? Forgive me for not being up on my fords. Can the IRS handle a heavy load like a leaf spring/solid axle can?
You can do it, but the truck isn't going to like it, and that's on flat terrain. If you'll tow through hills/mountains forget it. It's not just the dead weight of the trailer, but the wind resistance; it's like pulling a big heavy brick.
With the wheelbase of the Exp, sway will be an issue. Make sure you've got LT tires on there and be diligent about psi. You'll probably also want an additional tranny cooler (yes, an extra one over and above whatever came from the factory tow pkg).
I personally like to tow at the speed limit or up to 5mph over when perfect conditions allow. I also like to have a safe margin of my tow vehicle's capacity. IMHO, a 24' enclosed should be pulled with a 3/4ton pickup/SUV.
As Jim stated YMMV, but above all else be safe.
Good luck, have fun,
Michael