Well, the CHI heads have excellent velocity....they are not your typical Cleveland head. The port dimensions at the intake flange are about the size of a factory 2V head, but the heads will flow around the 380 mark.
We're also working with 460 cubes here, so the displacement will hopefully add quite a bit of bottom end.
With that being said, it's all relative.....this engine will be a tire fryer compared to some of the 408/427/445 engines that I usually build, but won't have the torque curve and bottom end that a larger big block would have.
But yes, it's going to go like stink.