Am I under estimating this engine?

Most everyone here who's looked at my posts knows my engine and all that jaz. I want to deck it out it's got about 260 horsepower stock and about 300 pounds of tourqe. (351 C Q code for those of you who didn't know) I want to put everything on it the question is. What do I really need to make near 400 horsepower and about the same if not more tourqe? Am I annoying yet?

What Cam, compression, headers, exhaust, intake, ignition, rear gears, trans, etc will you be running? Need more info :D

The whole thing is stock. It's a C-6 3 speed that's going to get a shift kit. I can't make up my mind on what's best!:banghead:

You mean power robbing C6 :)

Going to a C4, you will see about 20 or more HP to the wheels.

You looking for 400 at the crank then. Only way that is going to happen is with a little N2O, if your staying stock.