Wow, so many different questions all mixed up into one thread!

Speaking of 440's there is zero question that the 6 pack far outperforms the factory 4bbl setup. I'm sure this has more to do with the manifold than the carbs.
Someone linked the hotrod intake articles (ironically trying to make the opposite point, I believe) which shows that the sixpack setup does quite well indeed compared to AFTERMARKET 4bbl intakes and carbs at the 450hp level.....at some point that would change but if we're talking about stock to stock it's a no-brainer.

I suspect the small block 6 pack edge is a little smaller due to a better 4bbl intake....anyway, Tom would know so I'm gonna believe him on this one.

There is a reason why A12's do so well in PS, and it sits on top of the motor.

Dave