The cam...might be able to get away with a 3.2" with a good tune...but remember, just because you got a small ass pulley, doesn't mean your car is faster than the guy with a better tune and a bigger pulley.
I'd say at least a 3.2" on the IC...probably a 3.1" but keep in mind most people start going static on their injectors after a 3.1"/3.0"...so you might need bigger ones...just something to keep in mind.
I say cam, because it'll move your powerband and you'll notice gains A LOT in the mid range...you can run a guy and not get a downshift and pull just as hard...but, it won't be as streetable as an IC setup...but more fun IMO
