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

Guys/Gals: I'll be pulling and repainting the slant six motor in my 1974 Duster soon. I've seen many versions of the blue paint used to repaint these engines, so which one is the actual correct blue paint to use on a St. Louis built 1974 Plymouth Duster? Seems like when I go to a car show, every

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1974 Plymouth Duster VIN: VS29L4B230782

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Curbside Classic: 1974 Plymouth Gold Duster - There's Gold In Them

Mopar engine colors 1960 - 1973

Dupli-Color DE1631 Engine Enamel Spray Paint with

1964 - 1974 Factory Engine Paint Chart

Mopar blue engine paint - Moparts Forums

AUTOMOTIVE SPRAY PAINT – Dupli-Color Engine Enamel is a high-quality vehicle paint that contains Ceramic resins for maximum heat dissipation and gloss

Dupli-Color DE1631 Engine Enamel Spray Paint with Ceramic - Chrysler Blue - 12 oz Aerosol Can

Plymouth Duster - Year-by-Year: History, Engines, Production