My 67' F100 Ranger also does not have a paint code. I'm the third owner and according to the second owner who only had the truck a short time, the original owner special ordered his color. The story is that he bought a 67' mustang for his wife at the same time and wanted the truck the same color. My truck is the mustang Lime Gold color, not an option for 67' trucks. It is all original, so I know it hasn't been repainted over the years. That could be the case for your truck also. Just go look at all car and truck color options that ford offered in 67', chances are you will fine it as a car color.