This has been discussed many times but, in general, I've found that very little weight can be restored to the front axle of my 3500 series TV without requiring excessive loading of the equalizer bars. Likewise, only relatively minor "unloading" of the front axle occurs - even in a "dead load" arrangement. Excessive "hitching" is hard on the trailer - whereas the TV could care less. That's why many of us with heavy-duty TVs have opted to use 600 lb bars and been very happy with the results. Do a search and you'll find a wealth of information about the subject - much of which is in conflict with the hitch manufacturers directions.
2003 GMC 3500 D/A, CC, LB, 4x4 and 2000 Airstream Excella 30. WBCCI 7074