Big Block Edelbrock limitations.

You are really being generous on horsepower for a head that flows around 275 cfm max out of the box at 700-750 lift. How big a cam is he going with. 650 at most I would bet, probably lower. Then subtract .035 for lash and pushrod deflection what are those heads flowing now at his lift. Now add in how much he will lose with an out of the box intake. Hmmmm 600 horsepower, I don’t think so.
I completely understand. My maximum horsepower estimates for the Edelbrock 440 RPM cylinder heads have been doubted before, even laughed at. It's why I gave my opinion on what I believe I could get from the stock items, and why I said I had no idea what he personally could make.