Thanks- I guess I should've prefaced my initial post with I don't intend to have my truck judged for points or awards. Its more important to me that its accurate but its good to know which colors are accepted by some of the larger organizations. I am taking a purest approach to my restoration- at least staying as close to stock as possible while taking some liberties along the way. I will tell ya any future shows I take my Napco to very few people will even know the engines were painted gray let alone which shade of gray was used. Again, thank you for the replies.