Each of the 8 has a area of 8.29577 sq. inches for a total of 66.36616 sq.inches not sure if this does any good . Now i am not sure but i beleive you will need more info to properly determine flow rates like possibly pressure, and there may be other specs needed. There should be online calculators to help you find this. I think Edelbrock has a forum for questions and others may too. Good luck!!!