I had my seat re-covered by a local auto upholstery shop in a period correct but not-offered-by-Chevy houndstooth and vinyl in colors of my choice. I asked him to order plenty of fabric and vinyl that I will keep on hand for other projects. After I moved I found another local auto upholstery shop to re-cover the visors and dash pad in the matching vinyl. I recommend it. Just pick out your vinyl color and get some, and either have the shop cover it, or you cover it. The auto upholstery shop had a big book of samples to choose from.
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Here is the process for do-it-yourself that forum member Astro-Balls aka Mitch showed us:
https://web.archive.org/web/20190912...d.php?t=793182
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And from forum member KevinK7:
https://67-72chevytrucks.com/vboard/...d.php?t=804227
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