why do you want to use the Air Gap- with a supercharger wouldn't a single plain be better? and if you really want to go nuts- get some indy heads they'd reaaly like to breathe through a supercharger!
Last time I checked the air-gap was always within 5-10hp peak of single planes, plus they have that nice fat torque curve. On top of that I already have it, so it will be one less thing to buy.
I have a friend that bought the indy worked edelbrock heads. He had them flow tested in which they made 272cfm @ .700(may have been .600). The cast iron heads I now have were flow tested at the same bench and made 254cfm @ .550.
For me I don't think they are worth the money at this point. Maybe when my goal is to make 1000whp on pump gas. hehe. :iconbigg: