Hughes Engines seems to be almost a dirty word among the members of this site. I know they are very bias toward their knowledge of the Mopar Performance world, but I think most everyone who owns any type of business has to believe they are better than the next guy. If not something would be wrong in my opinion. I dont really care who sells me my parts as long as I dont get ripped off and the combination gets the results that I am looking for.
Edelbrock does rate their magnum heads at 58cc like fishy68 said. I just dont understand why if they are 62.5 straight out of the box. That is the issue I have with them, not that they sell a bad product or not use them.