School Me In Grill Emblems.

[BHTH]

I'm going to put this on the pickup site, because I think more Blazer guys come to the pickup site that than the other way around and I think this might apply to both. I have a 78 K5 Blazer Cheyenne and the grill emblem is thin stamped aluminum that is painted goldish. My uncle had a 78 K10 Scottsdale when I was a kid and I remember it having an emblem that was yellow transparent plastic. I seem to see product literature from Chevy in 1978 that shows both. I also see references to a K10 Blazer, something I don't think exists, but that's another topic. Who's got the skinny on grill emblems? How was it decided what got what?