Well I had the same question too, because I have had sooo many overheating problems with my car, that with my new motor I wanted to stick with iron heads. From what I have heard, they can be worked to flow as good or better, but it comes down to the weight, and some crap about engine temperature. I don't know, and if anyone has any feedback, I'd appreciate it as well.
------------------
Elisha (Mustang Chick Extraordinaire)
1994 GT/Saleen: Cartech intake,4.10s, full exhaust, pulleys, Compucar nitrous kit 125 shot
Sold the 1986 LX sedan

http://www.geocities.com/mustangbelle_306
AOL name: GT306Chick