The quench area of the piston will be the high, or machined part...the area that is directly opposite to the flat spot in the combustion chamber, opposite the valves. This is the area that will usually be responsible for pre-ignition. Bringing the piston closer to the head in this area (.035-.055") pushes the A/F mixture out into the path of the spark plug. In certain applications, the quench dome needs to be so high that they dish the non-quench area of the piston to bring the CR of the piston back down to a street fuel-friendly level.

And that's a really roundabout way of saying based on what you wrote, I'm not sure I understand the question...