70 340 duster non ac radiator fan

My '72 318 A/C Dart has a 2863215, I have a 2947 Hayden clutch drive. My '69 340/418 has a 2863 216 and Hayden 2947 clutch drive . Either should work fine, depending on who's radiator you are using, fan clearance can be an issue. Stock radiator on my '72. My '69 has a Cold Case, had to go back to the cast iron water pump, saves 3/4". More correct? They almost look the same.