Yeah check the coach's VIN to see if E350 or E450 that will give you the GCWR. (VIN decoder:
https://www.ford-trucks.com/forums/vindecoder.php )
Next take the coach to a scale and weigh it (
https://catscale.com/cat-scale-locator/ ).
Subtract that weight from the GCWR and if the results are greater than your truck you're good if not well then nope.
Have to say, however, that would look pretty odd going down the road: An Axis pulling a full sized truck.