BB cylinder head question

The Mopar Muscle article Demon Seed posted shows the 915 does not flow any more than any other head. I believe if you read the article, you will see they state it uses the same port design as the 906. The ONLY benefit to the 915's is the closed chamber, which can be of a great benefit depending on your application. At least based on the samples used on their flow bench, saying they outflow all other heads is incorrect. Airflow is basically within a few Cfm's of most of the other castings.