I like my 372ci Clevor. The much worked iron heads flow 335cfm in the intake side at .700 and the exhaust flows 175cfm at the same lift with no turbulence. All though that is a somewhat low ratio you would have to step up to some pretty big W type heads to come even close to that. I'd love to try my stoker set-up with CHI heads. My engine is in a Boss302 which is my main reason for having a Clevor type motor. For being "not good on the street" those big heads and the displcement yank my big 3500# Mustang around pretty darn well, so I can imagine what it would do in a 2000# Cobra. You can check my gallery for pics. Sorry but you'll have to wade through the pictures of women and Bosses and all that other stuff to. LOL
Steve