Original engine colors??????

I just got a curiosity Twisted grip is building the beautiful 69 GTS which appears to be the original engine color in it is turquoise I'd like to see some more original cars with unrestored motor colors in them so maybe we could narrow down when the color change was I know I had a 68 with a orange red motor maybe it was a maybe it was the assembly plant difference let's just see if we can narrow it down post some pictures post your pictures of what you have engine that have original paint car build a casting number on the Block anything you can come up with maybe this will be some fun thanks guys