State vehicle requirements

[78calico]

Getting your truck's GVWR changed will require certification by a truck builder. I imagine no truck builder is going to increase your GVWR just because you changed your axles out. I'm sure frame strength is part of the equation. Tire load rating would also be considered in the GVWR as well, but a lot of the bigger tires today have a high load rating simply because of the increased air capacity and not the ply rating. By certifying your vehicle, the builder is putting their reputation on the line that your vehicle is capable of the new GVWR. I know Bob's Services and Truckwell of Alaska are two truck builders, but they are located in Anchorage. Like Ole said, you can check with DMV and see if they can point you to a local truck builder.

Like Mel said, not Ole.
But yes it can be done. I used to do it. Build trucks that is. The actual paperwork part of it was done by the guy I worked for. I just did the heavy work.