Lynn, I talked with Gene Berg today and he didn't offer any hope of finding the Grove needle valve replacement for the Weber. Did you get yours from a Weber Dealer. JohnD
Its a Grose Jet. I can only find a company making them for New Stromberg 97s. Used on flat head ford V-8s. I would adapt one of these to fit the Weber. I don't think you would need one below 8,000 RPM.
Here is a nice story about the Grose jet, and the new Stromberg version.
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