gmc Sierra Grande Custom Camper

Barn find.
This truck has sat for many years, I have got it running and driveable, electrics/brakes work, rebuilt Holley 600 carb, paint is not great but serviceable. I believe the engine is a 350 but not sure, but it runs strong. Both the door sills (rockers) are pretty rusty, as is the front quarter on one side. I do have replacement sills for both sides and the front quarter, not fitted to the vehicle. There is no title, but I believe the vehicle to be clear. I did manage to get a registration on Vermont plates for an Antique Vehicle, tags just expired. The vehicle is stored in El Mirage California, 92301.Need to dispose of it as I'm leaving California in a month.