Square Body 1977 Chevy Silverado C30 camper special 1 ton Dually Pick up truck

Square Body 1977 Chevy Silverado Camper Special C30 “dually” 1 ton pickup.

Starts, runs, drives, shifts, steers and stops.
Lockable Leer shell (“bed cap”) included.
Automatic transmission, differential and engine serviced with new fluid and filters less than 1,000 miles ago.
Newer, small block 350 c.i. V8 (mileage accrued unknown).
New starter, new Edelbrock manifold and Quadra jet carburetor; new main oil seal, six newer tires (all above with less than 2,500 miles accrued).
Alloy “phone dial”wheels with spike bolts, LED headlights, JVC CD / AM-FM / MP3 / USB, Leer camper cap (black), towing package (hitch, dual tow mirrors, electric brake controller, brake and turn signal wiring .
Cracked windshield, some surface rust (original metallic blue, plus gray primer). Horn, clock and gear shift indicator display (“PRND123” on the steering column) don’t work.
There is a hole in the truck bed where a 5th wheel rig may have been installed at one time.
Actual mileage is unknown.