Hey thanks everyone for the replies. I did ask Jayco, seemed like everyone had good success in doing that, and they replied back with 26" to the top of the coupler. So....with the different numbers I am really curious to see what it is going to be.
The max rise with the shank I have and everything on the truck is 28.25" to the top so I think I'll be good, but there is only one way to find out.
2013 Ford F150 SCREW, 5.0, 3.55, tow package
2014 White hawk 28DSBH