QFA:
"Note: Light duty suspensions may require air shocks or helper springs to avoid rear end sag. Please check with your manufacture for vehicle hauling capacity."
NO KIDDIN!!!!
Rear end sag...that is the understatement of the year.
Not that I would ever wish disaster on anyone, or anything like that - but, could you mount a rear-facing camara on the maiden voyage!!!!
Seriously, make sure your rig tight, and within spec - and best of luck with it.
Good Luck Bro, Carl G.