[Jeff Lee]

A consideration with class racing which many people do not take into account is not everybody runs a Holley carb with two needles, two seats, two bowls. So the option is not a blue pump and regulator. Not if your going fast at least.
Q-Jets have small bowls as do Autolites like I run. The WAFB's I believe are also small.
I've run the "standard" systems (as prescribed by the manufacturer) and have seen their limitations. I've heard the sales reps arguments that "this is all you need" and proven them wrong. There are improvements to ET & MPH in fuel systems. Some are not using the "accepted" systems and finding consistent power.