Ford puts out a particularly good and complete Towing Manual each ear, and as Dave suggests, you really should get a copy. A quick Google search on "Ford towing" shows that you can download it from
https://www.fleet.ford.com/showroom/...06_default.asp. Please do it. I think you will find that you are in very good shape. The rest of us can guess at an answer, but you need to determine the real authoritative answer for yourself by looking at your particular vehicle in the towing guide. You should print it out and have it with you for those "I wonder if ..." moments.
Bill