N/A question

Realizing the blower will take a while to work up to....I was wondering what was the most horsepower squeezed out of a 1999 GT block? Heads, cams, whatever.....I want to know the best combo for natural aspiration....and yes that means no nitrous.
 
What is the best way to get the most numbers N/A? I guess a better question is would it be better to buy a shortblock and build a new engine or can the numbers from the previous site be reached on a stock block with a forged stroker kit, heads, cams, ect...?