My first post:
Have 1978 C-10 Shortbox painted Plum Crazy Purple with a 383, fuel cell, etc. Had big Mickey Thompsons on it when I purchased: the previous owner put dually fenders on to keep them covered rather than tub the box. I remember reading about "Phantom Dually" builds in truck magazines in the 90's, I never thought I'd own one, let alone a shortbox.
I think it was a neat idea but it wasn't for me. Although I'm leaving the drivetrain and fuel cell, I'd like to make it a little more sedate. Removed the flares and painting soon.