I realize this is a small block post. I have two day one COPO Chevelle engine pictures and the lift hooks are silver on both. Doesn't prove or disprove anything. Just a little added info. I don't recall the Oshawa workers installing the lift hooks. From what I remember, they were on the engines when they came from the engine plants.
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Chevelleless after 46 years......but we did find a low mileage, six speed, silver 2005 Corvette. It will just have to do for now.