Found my copy of the July 69 Hot Rod Magazine road test for an L78 Nova....they comment on the fan as follows: "A seven blade fan which doesn't have a vicious clutch is fitted. The fan makes a tremendous amount of noise at high speed, so while it does move a lot of air, this same action gives out the bothersome noise level. " they went on to talk about replacing it with a Flex-a-Lite unit for a future road test.....I think they were mistaken about the 7 blades....all conversations I have had regarding original fans for 69 BB's have been the 5 blade unit...who would have thought such a minor part would become so rare and expensive. I still remember throwing one away in 1974 from my first L78 Nova....also threw the Muncie shifter away...but that's another story
wilma
