What's the best engine paint for the red that's on the early slant 6s and 273s?

Mopar Performance P4349218AB, altho it's tough to find. Used it on a couple engines now. I buy as many cans as I can find lol.
Durable, stands up well.
**edit** what I do cuz the MP is in short supply is use another red that's close as a base coat, then top with MP.

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