I'm REALLY suprised the numbers on those edelbrocks aren't better! Especially if they were ported!

I ported a set of 6X-4 heads in my garage and go retty close to those numbers....actually better across the board on the exhaust numbers!

That is also a pretty big difference from port to port!

Mine flowed 258 int and 232 exhaust at .550 lift and was still climbing, but I didn't have them flow them above .550....wish I had! I had 2 chambers flowed and they were less than 3 cfm difference from 1 to the other.