What is the absolutely correct blue engine paint color for a 74 Duster?

DupliColor sucks dead camel balls. That's the brand I had that sprayed a different color from each of three cans. They weren't even close, either. I had to settle for something that resembles late Ford blue. That's probably what it is and it was mislabeled. If he wants it the dead right color, he better mix it of a color code.