I am currently rebuilding the engine in my 66 GT convertible and I am trying to find out what is the correct color of blue for the engine block, valve covers & air cleaner, etc... The current paint is the light Ford blue but several people have said that the dark Ford blue is correct. I have seen pictures with both the light and the dark blue. I have also searched the web without any definite answer. Which one is "correct" or are they both O.K.? I would really like to "do it right" while the engine is OUT of the vehicle. Thanks in advance for all of your help!