Tread revival… anyway, I am in the process of restoring my exhaust manifold. My heat riser shaft was almost worn all the way through. I cut it apart to get it out of the manifold and will make another shaft…that's the easy part. What I am not sure how to handle is the enlarged holes in the manifold. It seems there may have been bushings originally, but not sure. Anyone have any suggestions on what to about the holes in the manifold: bushings, etc.
chevs of the 40's offers an oversized shaft
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