I tow anything over 3,000 lbs (bumper pull) with a WDH if I'm going more than 30 to 40 miles. Much more stable pull and a lot safer.
If I remember correctly, my 210WBS was right at 16" for the top of the ball coupler. I towed with a Jeep Commander and had to use an 8" drop shank to get the top of the ball at ~16" with my Equal-i-zer unit.
My Jeep rides high...I believe the stinger is at 19", so, I had to drop 3" right off the bat and you have to allow for about 5" in height of the Equal-i-zer hitch head to the base of the ball...left me with about an 8" drop and allowing for spring squat from the tongue weight gave me a very slight (~.5") nose down attitude. You want level or slight nose down, never nose up when towing.
Hopefully some others will chime in with their measurements.