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.

https://uempistons.com/series-4595-kb-automotive-hyper-chrysler-dodge-360-5-9-kb107.html

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

KB Automotive Hyper - Chrysler/Dodge 360 / 5.9 - KB191