318 head options ... again!!

What Mopar Tim meant to say was "a low HP 318 does not require much in the way of flow"

A high HP 318 requires a high flow head. The compression of the motor just needs to support the octane gas you plan to run. If you are going to spend money, spend it to get the higher flow. You can always use thinner head gaskets or mill the heads if you are really sweating the compression ratio.

Going from 8:1 to 9:1 compression does not yield a 2% increase in power. For all that work your 200 HP motor now makes 204 HP....congratulations!