What PARTS did Hurst and Chrysler put in the Super Stock Barracuda & Dart not in other factory cars

I think this is another mistake in Jim Schild book
This is regarding the fan on these cars.
The book has a part number of 2585375 but has a picture of the fan that is different (I think is the right fan just the wrong part number) that part number is 2585376. I have a clutch and fan that I have and was told it can of a real SS car. The first two pictures is the fan 375 and the next one is the 376 fan and the 070 clutch.

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