I'm by far not done, knife edged the guides, smoothed some transitions raised the intake, and exhaust roof.
That is a tall order. Pros are getting 240s-250s on the intake. If you can get in that area they will support the horsepower you are looking for.I'm hoping for 225-250 cfm. The figures seem to be possible. That should make a possible 310-320 at the wheels, depending of other factors.