Quote:
Originally Posted by grandam1979
I ran a 6X head 455 for years it never went faster shifting at 5200 and 5500 was short shifting and it liked 5800 if you wanted to pull that last .10 out of it. Did you see he’s running a roller cam? His only restriction is the intake he didn’t say much about exhaust so that could be a factor. But again back to the original question what was his combination safe to again 6000 or less.
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Ahh, I sure didn’t say anything about the exhaust. I’m currently running stock log manifolds with a Pypes 2.5” exhaust with x pipe and Race Pro mufflers.
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1967 GTO