Correct Clutch Fans for LS-6?

[3macs1]

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I was told there are two correct clutch fans for the LS-6's.
I have one with no part numbers, it has seven blades, four rivets, has a H, 3, and Front stamped on it. Is this a correct one? My friend says no he says the 772 fan is correct! Can anyone help me solve this mystery? Need photo's.
Thanks! John

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I thought I read on this site on a past posting that many of the ls-6 fans were not stamped with a part number but were the 772 style. Rick (ss427) will hopefully confirm since I believe it was his feedback. My LS-6 fan is not stamped with a part number but my ls-5 one is a 772. They look the same side by side.