I pull my 2011 265RKS with a 2" lifted 2003 F250 Super Duty, power stroke, short box 4x4 and a Lund boat behind that. In order to have box clearance I needed to run a little out of level, but has never bothered the towing or units at all. I never camp unless I am unhooked, so it is not an issue for me.
2011 Jayco Eagle Super Lite Ht 265RKS
Reese Revolution Hitch
2003 F250 Super Crew Power Stroke 4x4
2014 Lund 1800 Tyee 175 Merc Verado 9.9 Pro Kicker