mto502
Founding Member
The Macs are very nicely finished around the ports where they hook up to the heads. No burs, weld beads and clean. I don't know about the BBK's but the Ford Motorsports are terrible. There's all kinds of weld and crap in those ports which wouldn't help with airflow. Anyone I've known that've gone with the Ford's had to port them out to help clean up some of that restriction.