Originally Posted by norachelhere

there is no probably about it, huge cams kill driveability...

here's another little bit to consider.
since you are already at 340 HP, and you already said you don't need 400 hp to go back and forth from work and what not, why not look into a simple nitrous set up?
you already said you would run the lower HP when daily driving and drifting, but would up to the higher HP tune when in a drag race. That sounds like the perfect situation for nitrous. A simple set up with a little 100 or even a 75 ought to get you the power you want and you wouldn't need to worry about squeezing everything you can out of the head. ya know.