Wagonbacker9
One string banjo. Maybe 2
You would be better off to swap your cab onto the 3500 frame, unfortunately it would still be a half ton by the VIN.
VIN tonage doesn't really matter. When I registered my K2500 They would have given me class A plates if I asked for them, and it was (barely) a class C capacity. You can register it for whatever capacity you want to be able to legally haul.