Well the thing about carbs is...theres LOTS of info in the archives about them here. And I could go on for a while about the basic two styles out there, but its easy to find. A quick lesson though, a Holley has power valves which base the big fuel flow on well...flow and need and throttle position, and also the butterfly and idle circuit and well...so on...well actually, explaining the whole ideas could take a while, the Edelbrocks dont use this system, rather a metering rod system, some say is easier to tune and less finicky. They will work great for tuning and driveability, I like the Demon series too, coming out as a great all around carb too.