Looks like a good idea. I'd suggest maybe using a much thicker piece of metal instead of the 1/8" that he used. A piece of 1/4" thick steel plate for example wouldn't flex when using a c-clamp like shown. Also, I'd use a rubber gasket instead of cork.
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Jason - '67 GMC swb | '57 Bel-Air 4dr hardtop | '56 210 4dr Wagon | 2000 GMC Sierra
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