1969 1100834 alternator fan

[BillG]

My 03B pace cars 834 alternator is dated 9A16 so, Ive always assumed its original.  The fan on it has the "shark fin" hook.  I've read that this is a high performance feature but, what makes this fan high performance as opposed to the non hooked fan?

[ko-lek-tor]

My experience is that it is just a fan. Maybe different suppliers? Perhaps Delco Remy employees interchanged the fans when supplies were low?
Regardless, I have 834s with “hook” fans and 837s without “hook” fans ( opposite of what would be expected) and I have vice-versa, the way expected. There seems to be no rhyme or reason. All of my examples are virgin unrebuilt originals. So, to me, these hook fans are just fans.

[BillG]

Thanks Bentley.  It just made me wonder if the hooked fan was somehow a better fan but, what you said makes the most sense to me.  Thanks again for the reply.

[KurtS]

You'd have to see the parts list for the alternator - maybe there was multiple fan #'s, allowing substitution.