71 Cuda 340 (with A/C) - What Fan? Clutch or No Clutch?

[Chryco Psycho]

Always a clutch fan , the correct 7 blade may be difficult to find Flex-A-lite as 18 " 6 blades available that work well as an option

[ksierens]

Thanks, guess I could use the Flex-A-Lite 6718 fan. I had also seen posts about needing to use a low profile clutch. The engine is not in the car yet, do you think I should order the one listed for my car, or get a lower profile one?  Also, they list a standard (Hayden 2706) or heavy duty clutch (Hayden 2747), any opinions? Oh and then there's the thermal vs non-thermal question!

[Chryco Psycho]

I would use a thermal Hd  , I have used the shorter clutch on 60s B bodies that did not use a clutch from the factory but std ones on E bodies , either will work as there is only about 1" difference

[dodj]

Back in the day Mopar Performance claimed these moved more air than the seven blade. The offset of the blades made for more efficient air movement.
I know when I installed one on my 440 in place of a symetrical fan, I no longer heated up at idle. 

[Chryco Psycho]

Are the 5 blade still available though ??

[dodj]

  I dunno?

[ksierens]

I did not see them, I ended up ordering a 6 blade flex-a-lite

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[Chryco Psycho]

MIght be as hard to find a 5 blade now as the original 7 blade , the 6 blade Flex-a-lite is a good fan too