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Tom, Allen is correct if it is for a 69 or 70 BB Nova, I THINK a clutched fan came on the 68 BB Nova cars. Chevy found out quickly that it wasn't cooling the high heat BB motor and switched to a no clutch 5 bladed piece for 69 and 70. The fan is unique to the Nova, it has 2 blades together and 3 spread apart and is 17" diameter. They are very rare, most were chucked early because they made a lot of noise. A dented up one sold on EBay immediately for $510.00 just recently. Call Wayne Bushey at NNN, he may have an extra, but get your wallet open. The only marks I have seen on the fans are either a "W" ot "TW" on the rear of a blade bracket, there are 2 different bolt pattern as well, the service replacement has 2 sets of bolt/mounting holes and an original assembly line fan has only one set of mounting holes, blades are the same on all. Good luck
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Great info. on the Nova fans! I've kept one of the non-clutched 5 bladed ones lying around for quite awhile now.
It had always looked kinda special to me. It was on my '62 BubbleTop BelAir that had the '71 Vette LS5 engine in it.
You guys & this site are an unbeliveable wealth of information!!
Keep up the good work.
