318 cam

Dale Davies said

Well, Billy mentions it in his book. Might be good to get a copy.
Then there are the high speed videos on a Spintron showing valve spring surge.
Judge for yourself.

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I've seen those. IMO that doesn't come from the camshaft, but valve float and possible bad or inadequate springs. There have been as many cam grinds as blades of grass through the years. If the camshaft was the source of that problem, I think we'd know it beyond a shadow of a doubt. It'd be a lot more than a theory. I believe these guys sit around and think too dang much.