Here are some measurements with the 800 lb bars and no dual cam. The setup wasn't ideal (tt not level side to side, tow rig not perfectly straight) and I only measured from one side of the tow vehicle. Hopefully it will provide some help as to amt of WD the bars were providing.
.............Front
No TT.........38
No WD.........38.4375
WD............38.125
NoWD-NoTT......0.4375
WD-NoTT........0.125
WD-NoWD.......-0.3125
...........Rear
No TT......39
No WD......37.5625
WD.........38.125
NoWD-NoTT..-1.4375
WD-NoTT....-0.875
WD-NoWD.....0.5625