pin to ground and pin to trailer measurements 32QBBS

I've got a flat wheel bed on my Dodge 3500 DRW and I'm in the process of selecting a hitch. I've looked at specs for a couple of low profile hitches 8", 10" & 12" in height and am wondering how low I need to go. The surface of my bed is higher than a typical bed on a pickup.

Assuming a 32Q is level on a flat surface like a parking lot, I would like to get an idea as to what the distance is between the pin and the ground. Also curious about the distance between the pin and the trailer (wondering if the distance between the axle and the back of my bed is too great). I ordered it with the Trail Air Roto Flex Pin Box, Trail Air Equa-Flex Suspension System and the 16 inch Aluminum Wheels w/Load Range-E-Tires. Maybe some information on your model number and options like this would be helpful. And how much adjustment range you have if you know that.

Thanks for your time.