No, suggesting they were shallow was in no way inferring there would be VTP clearance issues.
They are shallow, as historically, even with Chevrolet heads, which used 18° instead of Holden's 12° giving them a deeper 'pocket'.
In my application, I am using a positive deck height of +0.005" and flat top pistons. No clearance issues.
If that head has had a valve job, the volume will be more. A different spark plug will affect the volume. The layer of vaseline will affect the outcome. Mine measured 58cc. I repeated the test many times over.