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http://www.raceflowdevelopment.com/RFD-heads-SB2-2.htm
Curtis has a virgin set of casting to do a set for a 460 I am building, the only difference is it will be lightly less as the combustion chambers won't be as small as say a comp motor, mine is a bracket motor and at 460 CI I already will be running a dish piston at roughly 15 to 1. Getting the valve closer to the deck picks up airflow. The 447 I currently have in my car flows 398 @ .800, average for later cup heads probably up to 420.
 

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Really depends on what its for. Application wies.... circle track/drag racing, land speed ect.....

Like any set of heads, they will be built and ported by what that short block calls for. CID/rpm/target HP ect....

But Yes, like said above, anywhere from 390-450cfm. Intake valve size and vjob used has alot to do w/it as well.

Mike Theroux
www.mikesportingservice.com
 
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