Only 460hp

Yup yup. The cams intake lift is around .540 at the valve, and it’s not there for long. If the heads are closer to 260cfm @.550, then the 460 number is close. Also shows why the torque curve is what it is. More cam would help if you wanted more hp. As would a larger volume intake manifold.
Hey moper. Where ya been?? Good to see you back!