Thread: Assembly line Weatherhead petcock radiator drain
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Old 07-23-2019, 11:00 PM
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Rich from my experience with 1970 Chevelle Big blocks (can't speak for other models)
The assembly line Petcocks I have seen have also had the Weatherhead or Eaton Logo right on one side of the bolt and the bottom had a unique flat head notch.
See photos.

What you have IMO is an over the counter unit if it does not have a logo on one bolt side.
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