Nice heads pro topline~ i have AFR heads on mine. www.airflowresearch.com
they have the most CFM flow~ they even have 205cc !!! I have there 180cc with 67cc~ =D ~ pro topline are good ones~ it all depends on your valve springs, rockers, lifters, stroke, compression, etc. Just match up the right camshaft to your heads and your ready to go~ 75% HP/TQ comes from your heads~ the 25% is from your block.