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
