Oldest '64 273 casting...post them up!

65dartcharger said

I have a 273 casted January of 1964 but assembled February 26 as a 273 Power pack engine!

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Per the Valiant.org website, the 273 was designed for the Valiant. It went into production in December of 1963. Your Nov block could have gone into a Dec or Jan produced vehicle. The block should have an assembly date stamped on it.