Can someone id this GM seven blade fan for me ? I picked it up back in the late 80's with a package deal i bought, i even forgot i had it until yesderday going thru some boxes. I think it's off a 68 375hp car dated july.

Center hub is steel and blades are alum.

stamped on each fan blade
913894
3931002 G68

Thanks

July 68 clutch fan...From what I've been able to learn, it was used on BB air cars and with option K02 which was a clutch driven fan. I have that fan on my 68 325/396 with the clutch driven fan. I don't have air. The window sticker # is 6K02AA