470 Build - Yet another

moper said

EFI can't provide more airflow. With the heads being stock with big valves I don't see it going too far past 530-540 tops.

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OH SO CORRECT.

And if the throats and bowls weren't corrected........he just lost airflow, even at the first lifts. We worry about shrouding the valve with the combustion chamber, but what about shrouding the throat/bowl with the valve?