To be blunt though....... you’re not really going to be able to “take advantage” of those heads with a hyd cam on a 340 that will be run with 3.23’s.
Where those heads will start to shine on a 340 will be beyond the onset of valvetrain instability(valve float).
Just cam for how the car will be used, then iiwii.
That Howard’s cam GE posted is probably going to be as good as anything....... up to the point where the valvetrain gets unhappy.