The originl 3V heads flowed slightly less then the 2V heads at low lift. Lift beyond about .4 the 3v flowed better. Your duration below .4 makes it about equal BUT the difference was basically more material around the valve which ...if taken back down to match the 2V would make the 3V better then the 2V at all lifts.
That's the theory anyway. Not sure f the later 3V's were trimmed better.
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