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I found some heads on a 1985 318 boat motor with adjustable rockers. I couldn't read the casting number, does anyone know how these heads would perform. The motor also had a steel crank, the guy that had it said I could take it for free. I have a 340 block that I was thinking it might work for.

I found some heads on a 1985 318 boat motor with adjustable rockers. I couldn't read the casting number, does anyone know how these heads would perform. The motor also had a steel crank, the guy that had it said I could take it for free. I have a 340 block that I was thinking it might work for.