Theres a guy on here that used the gage blank off plug and cut the center of it out to fit this tach shown below. Then he removed the tach glass and chrome bezel so it would fit in the stock barracuda bezel. I have some pix of how he did this with a regular style SW tach. I am planning on doing this on my sons 69 with an SW sidewinder tach. Paint the needle flourescent orange and viola instant factory looking tach. My 67 , i will hide a shift light in the parking brake indicator bezel.
Hope this helps
Matt
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