Measure the height of the frame from the ground between the wheels. If the hitch comes straight from the frame, this should be your hitch height.
2011 F350 Lariat Ultimate Dually 6.7 w/ B&W Companion
2014 Heritage Glen 356QBQ
2016 Explorer Platinum, 1998 Mustang
1SG(Ret) (1987) US Army Aviation
Days/Nights Camped 2016: 34