Well, yesterday I hitched up the trailer ('96 28' Excella) to the tow vehicle (05 Dodge Ram 2500 4x4 Quad Cab with Cummins) and with the 6" hitch bar, the trailer was level when the WD bars were tightened. The receiver height was about 2" higher than before with no load, but with everything hooked up, it looked pretty good. I called Tech Support at Hensley this morning and they said that having the trailer level was all you are looking for. I read level both on the external level and on a cabinet inside the trailer. The distance from the bottom of the hitch to the ground was about 10.5" Putting an 8" hitchbar on would drop that pretty low to the ground.
I think I have a pretty good setup as-is. The hookup to the Hensley took a few tries until I saw the three slots and locked it into the middle one. Live and learn. The only thing remaining is to adjust the new Prodigy brake controller on the road.
Thanks for the responses.
T.V.:'05 Dodge Ram 2500 4x4 Quad Cab Cummins