Like Darrell stated the tops of the domes should be "softened" in order to minimize points which can cause pre-ignition.
before the Coatings came about we glass beaded the piston tops (taped the ring lands with duct tape).
The glass beading gave a dull textured surface on which a nice even coat of carbon would deposit-- giving an insulation, which protected the piston tops.
The D port 077 heads look like the exhaust side of Brodix race heads of the 80's and 90's.
They flow much better on the exhaust than the earlier heads and the exhaust is where most heads need help.