The dimensions of the cores are shown in the '42 shop manual (copy attached). According to the '46 shop manual supplement, '46 models used the same radiators as in '42.
A 1948 dealer service bulletin (attached) indicates the late-'47 and '48 rads used different part numbers compared to '42-early '47 units due to redesigned caps and inlet hoses. These should be minor differences.
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