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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