I Believe the Model 74 is the 60HP V-8 and the Model 78 is the 85 HP.<P>The rad part number should normally have the model number as the pre-fix, of the part number,<BR>ie.,the rad p/n for your car would be 78-8005.<P>Your rad might be an after-market, and may fit just fine, you have to check it out.<P>The V-8 factory service bulletins 1932-37 and the 1937 chassis parts book for 1937 should still be available as reprints.<P>If not I'm sure many Early V-8 club members in your area would have them, to check out this info.<BR>I hope that helps.