I think you need to understand engine internals a bit more.
That sort of power will require much stronger engine components than the stock parts.
Worldtour is running on the ragged edge of what the stock block can handle, and he is well aware of the fact that one of his con rods could go at any time.
Saleen had roush build several 450hp supercharged motors for the Saleen Contour, and Saleen destroyed at least 6 of them in a very short period of time (this is at least partly why saleen never produced thier contour)
I really think you are looking at things the wrong way, you are trying to throw parts at the car to make it faster. Decide what sort of HP you want first, then study up and find out what it will take to make that kind of power.
