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Re: Stripped Choke Knob Repair
The original knob design is partially hollowed out with a small tube in the center that is connected to the outer part with three webs. I've included a photo of a NOS 68-72 knob. The repair I outlined above was actually my second attempt. On the first attempt, I tapped the center tube to 5/16, but the remaining wall was too thin and fell apart when I tightened a segment of a bolt in there.
I think you could get away with a helicoil if most of the original material is still there.
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