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#2
02-17-2013, 06:21 PM
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Ok, here is some more clarification now that I have an example of each fan in my posession...
Your common "772" fan:  And a real deal 3999265 72' LS5 cooling fan vs. a 3999260 fan, used on SBC cars from what I can tell. (the shiny one is a 3999260 I restored and will not be using):    
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi 1969 Malibu COPO L72/M20/12 bolt 3.31 posi 1968 Malibu LQ9/4L80E/12 bolt 3.73 posi 
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#3
02-17-2013, 06:26 PM
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So just to recap, I am 99.9% sure that:
3947772 fan is correct for 1969 & 1970 HP big block cars. (L78, L89, LS6, L72) 3989095 fan was used on 1971 LS5 & LS3 3999265 fan is specific to 1972 LS5 & LS3 Hoping this will clear up some confusion for others down the line.
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi 1969 Malibu COPO L72/M20/12 bolt 3.31 posi 1968 Malibu LQ9/4L80E/12 bolt 3.73 posi
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