So is it just CFM? When you need more than 260CFM from the exhaust port, (80% of 330CFM intake) you go round port exhaust? Is the chamber any different between a edelbrock round port and the Eddy D-port? Is one chamber better than the other?
How much can a D-port exhaust port realistically flow?
If you had a D port and a round port that had similar flow numbers and port velocities, would they make similar power?
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I could explain all this to the girl at the parts store, but she'd probably call the asylum.
White '67 LeMans 407/TH350/Ford 3.89... RIP
Red '67 LeMans. 407/TH400/Ford 3.25
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