Rpm 340 Cyl heads on a 318 !

Interesting story. This disproves the "flow out-powers compression" argument.
Yes, I do believe one person who says that a lot also has said his car's "60 ft times are lacking"... not any wonder with the low compression loss of low RPM torque. In all fairness, I do believe that is with a stock TC; a high stall TC can somewhat cure that if you are drag racing. But that 'fix' just does not work in all applications.

And I have to wonder if dibbons' case also may have involved some flow blockage into the small bores, despite the notching. So that would not be a compression matter per se.