Any clutch fan options for 73 dart, /6?

So for clearance, the hot ticket was the Hayden 2765 Jag standard duty. This had the shortest mounting ability, but some found that it wasn't cooling effectively.

So the update to the 2765, is the Hayden 2947 heavy duty fan clutch. From my reading, it is a scosche longer, but being HD, it moves much more air. So "If" it fits your application, the Hayden 2947 is the hot ticket.
Wouldn't a hot ticket require even more cooling ?

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