Recently someone was telling me there are two different kinds of fan clutch’s? The kind you get from Hayden and the one you get from Tonys mopar parts? I forget what that person called each but they said they behaved completely differently. The one from Tonys will cool better. Anyone have an insight into what the differences were again? If any? Thanks guys.

Ive got the heavy duty short hayden version on my 67 GTX. It cooled better then the fixed fan. My vote is for the fan clutch.