I've heard it was 17". Any idea where I can find a 17" fan blade? What I mean by that is which year and model catalog will would be a match for a 1959-62 261 engine? I have a parts breakdown book for the 48-53 trucks but all it has is the 14" version in a four blade. I don't have a 1959-62 motor book.
The fan that was on the truck is a flex fan but I've removed it. I really want the original look black 17" version.
BTW: I've added before photos of the motor on the web site (linked below) if you want to see the 261 motor and water pump set up.