1966 Base 327, AC, PS which alternator pulley fan

[David P.]

I've got a 66 base 327 with AC & PS trying to determine which alternator pulley to use, car was built 12/65. Not sure whether to use 3875968 or 3909817, both appear to be the relatively the same size.
Thanks!

Other pulleys are:
Crank - 3850838
Crank add on - 3751232
Water pump - 3890419
PS - 3770509

[Joe L.]

Re: 1966 Base 327, AC, PS which alternator pulley fan

I've got a 66 base 327 with AC & PS trying to determine which alternator pulley to use, car was built 12/65. Not sure whether to use 3875968 or 3909817, both appear to be the relatively the same size.
Thanks!

Other pulleys are:
Crank - 3850838
Crank add on - 3751232
Water pump - 3890419
PS - 3770509

David------

I believe it would be the GM #3875968. For one thing, the GM #3909817 which did eventually succeed it, did not exist as early as 12/65.

[David P.]

Re: 1966 Base 327, AC, PS which alternator pulley fan

Thanks Joe! I kinda assumed it was probably the 3875968 as that's what the judging guide states, but there is just a lot out there about both types.
David