Yes, the old multi-groove trick. They really don't hold up when you rev it up. Your right Medik, if you can't spin a Cleveland any higher than that, then you'll never experience what it's all about. I had a 4-barrell Cleveland once....Single plane intake and a huge Holley carb. It didn't even REALLY start to pull good until over 4 grand. Get yourself some good valves and enjoy some 7000 rpm pulls.
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