Correct fan clutch for '65 L78?

[Barbara S.]

Can someone more knowledgeable than me tell me whether the fan clutch shown in this photo is correct for a '65 L78 car?

Thanks.
Tony

[Bill W.]

Re: Correct fan clutch for '65 L78?

The judging manual gives a good discription of both types. 65 BBs # 16120 & 17346 had the flat blade type and were not dated. Bill

[Greg Janko]

Re: Correct fan clutch for '65 L78?

I think it should look like this

[Barbara S.]

Re: Correct fan clutch for '65 L78?

Based on the description in the JG, I think my fan clutch is the second type described for L78 applications, but as they say, a picture is worth a thousand words...

[Joe C.]

Re: Correct fan clutch for '65 L78?

Yes, that is an original Eaton type fan clutch, and looks like a very well preserved one. The picture posted by Greg, above, is of the Schwitzer type, and both are correct. I know that yours is correct because of the shape of the raised reservoir, and the fact that there are 2 sets of 4 fins that are "fused" together at 180* opposite ends of the outer edge of the cover.
From what you show, there's no way of knowing whether it's from a BBC or a SBC. Your L78 should have the short, 1.5" shaft. "L28F" signifies December 28, 1965. So, it is for a 1966 engine. Also, the TIM&JG states that a BBC unit should have "CK" ink stamp on the reservoir cover. Many experts state that the CJ/CK stamp was not used until late 1966.
In any case, if you have your core restored, you can have a correct date inked on, and delete the "CK" stamp if you desire. You can have it inked in, and remove it in the future with some lacquer thinner or acetone.

Joe

[Barbara S.]

Re: Correct fan clutch for '65 L78?

Thanks Joe. I appreciate the tutorial. I'll follow up with your suggestions.
Tony