I don't like Mustang dyno's. They seem to be very tight dyno's giving small numbers IMO. My 511 has 11.3:1 compression, 270@50 SFT/.650" on 110* cam and Edel max wedge heads. I often find myself shifting at 6000rpm now days. The engine just sounds and feels like its ready to shift there. This is street driving and if the tires spin I let it rev to 6800 before its ready.

http://www.youtube.com/watch?v=aIxaesJ190U

http://youtu.be/lCZAaN7fFLg