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Fan size vs shroud size

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09-21-2012, 11:30 AM

John

Senior Member

Join Date: Jul 2012

Location: Maryland

Posts: 172

Fan size vs shroud size

My 71 has a shroud that seems to measure 21" diameter. My fan is the stock 18" 772 (7 blade). I would like to upsize the fan to take advantage of the larger shroud to get the better cooling. What is the next GM stock size up (7 blade). 19" or 19.5?

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