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Numberdummy the radiator hole in my radiator support measures 18" high and 27 1/2" wide. That doesn't match the two sizes you posted.
Ford does not list the hole sizes in with the core support listings. He must have gotten those measurements from somewhere else. Or your support has been altered by a PO. But with 18" high that tells me it is a 4X2 without super cooling package core support.