This looks almost identical to your set up and it put down 566rwhp @ 6500rpm plus 458rwtq @ 6100rpm with a stock short block & stock unported heads:
The combination of centrifugal supercharger, Ford Performance intake manifold, and Detroit Rocker cams does extend the torque curve at the top end of the rpm range (hence more HP) compared to what you'd get with a TVS or twin screw.
The above looks like a "hero run" 'cause here's another dyno of an almost identical set up making a more conservative 518rwhp & 445rwtq.
Here's another at 552rwhp & 446rwtq:
All on 93 octane pump gas plus a Brenspeed tune.
With those sorts of numbers plus a weight advantage, you'd beat a stock '07-'09 GT500. However your engine's already right on the limit whereas the GT500 can be easily upgraded to 600+rwhp without even breaking sweat.
