intake port CC ?

[Adger Smith]

Pick the head that has the largest cross sectional (CSA) area for the cubic inch you are running.. CC's can trick you because a long narrow port can have a small CSA and another port with the same CC can be short with a bigger CSA. The long narrow port will usually have high velocity that makes low end TQ & limits RPM, esp if they are small for the Cu in of the engine.