if you order from RVW, they will help you with the proper ball.
just another point, though the stuff you put in the truck, really doesn't affect the trailer's hitch weight, they do affect the truck's GCWR(gross combined weight rating), which is what the max of the truck/trailer combo can weigh.
and you get the truck's payload number from the sticker on the driver's door.
remember, that's rated with only a 150lb. driver in the truck.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC