I don't think there ever was a factory seven blade flex fan;
As I have come to understand, this is how Pontiac V8 fans were:
- 4 blade fixed
- 5 blade flex
- 7 blade fixed; clutched
It is also worth noting that generally speaking the different fans used different spacers.
The four blade pictured above does have a spacer that I generally associate with the flex fans...
I am very glad that I posted here, because this has been a great discussion so far!
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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.
1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
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