Jeff,
I "think" the sticker that was on there was original, and the PO painted around it. I know they painted around it, I just have to assume it was OEM.
The instruction sticker I got from LMC is a copy of an earlier version, but it's all they had, so I took it.
Since your Blazer doesn't have it, the warning sticker pictured may not be correct for 77. I know I have seen them, but can't remember what year they were on. I guess I will leave it off until I can verify one way or another.
Thanks again for the input...