The only photo I found on the three online sites I checked was the 1959 builder's photo. That could mean that people didn't take pictures of them, or that those pictures haven't been posted online, or that they're on sites I didn't check, but they don't seem to have been common in the 70s.
On the other hand, the GN's 85 ft cars did last into the BN era, so C&O's very well could have.