How Accurate is Camquest?

How accurate is camquest because i punched in all of the information and i dont know i just have a hard time believing my car has this much power. I mean yeah it feels quick but i dunno i just dont think its this strong. i would think that my combo is good for about 425 maybe, but according to this program i have 458hp@6000 and 442ft lb @5000 this is my combo:

Small Block 360 bored .030 over
Stock Crank but has been rebalanced
Keith Black hypreutectic pistions Compression ratio is 10:1,10.5:1
Fully Ported out 2.02 1.60 valve Mopar X Heads
Comp Cams Hydraulic Flat Tappet Cam XE284H-10 (lift is at .510)
1.6 Ratio Comp Cams Aluminium Roller Rockers
TTI Headers with 2.5 in pipe into 40 series flowmasters out all the way back
Holley 670cfm Street Avenger Carb
Edelbrock Air-Gap intake
MSD igniton everything

anyone ever use camquest and dyno their car to prove it matched?