Originally Posted By can.al
i read somewhere that there was a factory bulletin to remove some 7 blade clutch fans.With the
fan clutch slipping at high speeds the big fan was turning slow and actually blocking air flow.
An easy test would be to try a standard 7 blade mechanical fan.I've never had anything but bad luck with clutch fans...they all ran 200 - 205 on the highway and hot at idle as well.


Actually that was my next step! Glad someone else agrees. I have several 7 blade mechanical fans in the attic.

67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......