In a way these are a "wish sandwich". A raw casting for your choice of porter to use to make the head what you wish it to be. Other than casting source it wont be an Edelbrock head it will be whoever does the port work's head. It wont be constrained by multiple production cost concerns/compromises. Results for a specific application should be the only thing its judged by, not numbers.
Like most I am curious to find out what they may be capable of. Curious to see not what only can be flowed into them but what can flow out of them as well.
Only concern I see is the spark plug hole location shown in the chamber pics on the first page. Unless I'm seeing it wrong, it appears way too close to the exhaust valve and seat which could become a serious source of very destructive preignition events. Its not a cool place for the spark plug! Pun intended. Hows that plug going to get cool enough? Looks like it could become a glow plug where its placed.
This link for info on difference between detonation/preignition
http://contactmagazine.com/Issue54/EngineBasics.html
Preignition will kill a motor near instantly, it will live longer in detonation and near impossible to react to preignition. Damage done then you hear/feel the result. I have first hand knowledge of results of preignition. (in my instances was a fan cooled motor where I raised power beyond capacity of the head cooling capability.)