Fan question (UPDATE: Nevermind keep scrolling lol)

67fish383S said

The one on the right has one more blade (came off a ‘67 273) and will fit. Seems to me 6 blades are better than 5, but what do I know. Any advantage to either one

Click to expand...

There are a few things that effect fans

1. The number of blades
2. The pitch of the blades
3. The outer diameter of the fan
4. The width of the blades
5. The length of the blades
6. Lastly, does it fit your water pump or clutch setup

I agree with 1969383S that the stock setups were designed by engineers and tested. They worked fine for 50+ years.

If you have increased the heat output if your engine then adding cooling by installing a more efficient core should take care of it.