Pistons specs question for 340 build

Another example using Chrysler pistons.

KB167 Flat top with valve reliefs. Has a POSITIVE head volume. ADDS TO the total chamber volume.

KB Automotive Hyper - Chrysler/Dodge 360 / 5.9 - KB107

KB191 Dome with valve reliefs. Has a NEGATIVE head volume. REMOVES from total chamber volume.

KB Automotive Hyper - Chrysler/Dodge 360 / 5.9 - KB191
I think that "CROWN CC" is a rarely used measurement of the volume of the eyebrows, not the piston material. in the 4595 specs, the volume is actually 5 cc's of material REMOVED from the piston face... anyone else would state that's a -5cc ...That's whack!