Grandfather's 68 SS Camaro.

[WILMASBOYL78]

That fan blade is not a Chevy item as far as I know. The 68 BB had a short water pump and depending on HP rating or options like A/C you could have a fixed 4 blade or a clutch fan with 5 blades. The 4 blade fan would require a spacer to position it properly inside the shroud.

This info is well presented on the CRG page I sent you. Of course, you can adapt to fit your needs...more horsepower usually increases the need for proper cooling system components.

-wilma