1968 GTS emblems

So when were they red and when were they black.

Could you get red or black on any body color ? Or did only certain body colors call for either/ or??

Also when equipped with a 383, did the 383 emblem on the fender always match whatever color the gts emblem right above was?

I have been pondering these exact same questions. Ours has Red GTS emblems and black 383 emblems - but they are all reproductions installed by the PO. Just this past weekend I scored a NOS set of red 383 emblems at a swap meet so I will be installing those so that everything matches. I sure would like to know the complete story here however...