Points well made and worth investigating. I did read the Carcraft 620 HP article. Those were Eddy heads but I was adressing another post who was advocating the use of "Airwolf 220" heads who promote that they perform very well.

My research affirms your basic claim to the effectiveness of Edelbrock Performers and there's no argument there. I just want to hear from a variety of owners who used different brands. A fair asessment is only logical and is always good for research and recording data.

Thank you