I would use 10% of gross weight as a starting point for the correct weight of hitch. Equalizer is good, however the heads ARE NOT interchangeable if you decide you want lighter or heavier bars. I have used them in the past and they work well. I currently use the
Eazlift Elite I use 600# bars on mine (lightest I could find), but the same hitch head will take up to a 1400# bar if needed.
Aaron