If no one else jumps in, I would just call them, ask to talk to a tech person, and just ask them direct on it.
Yearone has, or at least had, some kind of dis-claimers on sheet metal and I would get their opinion on it too.
Also ask what brands they are and if the same, like they probably are, you will get two opinions on the same product.
-Parting Out over 75 '58 to '73 Full Size Chevy Cars-
-National Impala Association
-Vintage Chevrolet Club of America