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How accurate this this data???
http://www.camaros.org/coolingsystems.shtml
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This info is the same as stated in MacNeish's '67 Z/28 book for part number 3871276; I have the correct fan clutch and a 69 7 blade fan will fit the clutch as it has a 3.25in hole and a 3in hole fan will not work. Oh what fun the GM engineers must be having with our hobby....