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.
Given the initial lack of info and the basic general question asked, that field is wide open to an estimated output. How far does one (or can) push it for there given parameters is the limitations of ether the wallet or head or engine combo parts.
Running the head stock with the goal of pushing it as far as possible is way different than the street machine spelled out above. Though it does make one wonder what a 15-1 - 440 w/stock bottom of the page cam, etc.... Edelbrock heads could do
