E58 400 plus HP Dart sport build

It's going to take more than "mild" porting (bowls and window clean up) and not moving more material. I never believe anything off that particular dyno until it proves it at the track.
Yeah I may schedule some time here in Tulsa at a dyno and see what I get either it does but it does benefit me with a tuned broke in engine. Save's me the hassle at home in a garage.