I wouldn't doubt that at all. I saw some of Elliott's blocks back around '83- '84, and they were Ford blue. I don't have a lot of knowledge about Cup cars, but I WAS involved in dirt and asphalt short track at the time, and my best guesstimation is the block would have been black or bare cast iron, maybe Chevy orange. The heads, probably bare cast iron. The oil pan, probably black, possibly bare steel. I would bet that if you went with any combination of that, no one would ever argue with you. They definitely were not aluminum, though. Not in the 70's. Only the intake was aluminum at that time.