Just as with any other build, it’s all about the “combo”.

572-13cnc365’s are enough head to make over 900hp.
They are designed for high compression race engines utilizing big cams.

If they’re on a combo that’s falling short on HP........ it’s likely a poor combo that simply isn’t utilizing the potential of the heads.

I wouldn’t consider a .600-.650 lift cam big enough to exploit the attributes of those heads.