whats the VIN on the frame? Is there a spec sticker inside of glove box door? How is the vin tag on driver door fastened? Could very easily been moved. I may be completely naive but Cs were 2WD and Ks were factory 4WD and the VIN will tell the story.
~ HB 1966 Chevrolet K-10 | Ghost: formerly Flappy Fenders | In the Stovebolt Gallery 1962 Chevrolet C10 1962 Suburban