Re: Wolf Whistle.
That whistle in the video is a reproduction, not even an original design.The old ones were red, with a straight pull, not a lever. They had a water transfer picture of a wolf in a tophat. They worked very well, very loud, and were, as John said, variable loudness, which in effect sounds like variable pitch. John's whistle apparently was a reproduction also.
There are two vacuum tubes connected to the driver side of the manifold. The front tube serves the distributor, the rear tube serves the windshield wiper. This tube is the one to T off to the whisle. As you have no original vacuum wiper, the rear port on your manifold may have been plugged.
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Alan
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