Quench Vs Piston To Head Clearance

First, let's get distance set up. You start to loose the effect of quench when it is greater than .055, or as I'm told. Getting it tighter is a good thing. It does how ever depend on the rod material. A steel forged rod is pretty standard and can get to .035 easy enough. But an aluminum rod will stretch a little more. Take not of the rod manufactures suggested limits.

Now you seem to have Piston to Head clearance OK.

Quench. Imagine a flat top piston set at zero deck height. Now, picture a Edelbrock head. You know the chamber is small and some of the flat area sits over the cylinder bore.
When the piston comes up close to the head, this becomes the quenched area. (High sqush area) this small area pushes the air and fuel out and into the more open area of the head.

This last instant of piston travel shoving the air and fuel out help create that last instant rumbling of the fuel, it also acts like a false compression increase. It's because of that last instant where the quenched area is so small it is like a quick turbulent fuel increasing the pressure in the cylinder.

A typical gasket used is a .039 Fel-Pro. This is a safe amount to run. I've gone tighter where the quenched area doesn't get carbonized. This is better.