I have a 2000 K3500 CCLB SRW with a 9,200GVWR & 4.10's. I run air bags on mine and recently had it loaded with about 1,000lbs in the bed and 8,500lbs on the 24ft car hauler behind it. So with a 10% estimated tongue weight, lets say a 1,850lb payload. With my bags at 60psi and using the proper...