Have you guys watched this film, Master Hands by Chevrolet?
http://www.archive.org/search.php?query=Master%20Hands%20AND%20mediatype%3Amovies%20AND%20collection%3Aprelinger
The second part shows the 193? Chevrolet factory building the 216 cubic inch engine. It seems so crude compaired to todays standards, its no wonder they are different colors of paint. I would bet, day to day you see a difference in color or even from worker to worker. Joe
