Slightly strange head flow question.

Here's the question.:

The build includes - Cam .540 lift, M1 intake, 392 cui stroker, 800cfm carb

With ported 589s (2.02 valve) that flow [email protected] the engine makes 420 HP

With OOTB RHS heads that flow 255 @ .550 it might make around 435 HP?

With "hyperported" Eddies that flow 300 @ .600.............would it make any more HP ?

............or is there a point that the heads won't show any improvement?

In other words...is there an "ideal" port peak flow # and how is this calculated?

(Assume the intake is gasket matched etc and best valves etc.)