Highest flowing sbm heads?

I have a question for the folks here. They advertise the Victor head as a 225 cc intake port. But it is a raised port with an additional 3/4 or 7/8" in port length. My math says that if that port were the standard length for an accurate comparison it equals about 200 cfm. Thats a lot of flow advertised for a 200 cfm port. Wouldn't the velocity be incredible? Doe's anyone port these heads further? Am I wrong in my assessment of the port volume thoughts?