A little bit of confusing description by Classic Parts.

"Replaces original perfectly", but not perfectly original appearance. I think that GMC went to plastic/taped harnesses in 1954. Earlier GMC harnesses were most likely cloth covered (as were Chevrolet's).

I do not see Classic Parts (or Jim Carter) listing cloth braided covered harnesses (they both use to lust them - probably too expensive to keep in stock?).