This head would make 1050+ on a well built 572
http://www.racingjunk.com/post/10374...ictor-cnc.html
or for a 1200 + you could use this,
http://raceflowdevelopment.com/dart11.html
I'd use the Victor CnC head really, .. it's a damn good deal, ..
make great power, .. and will smoke the Dart and Brodix cnc heads.
Curtis