Not my original words, but an excerpt from an article in Corvette Fever magazine that underscores Techinspector's concerns:

"An important concept to understand is that combustion is not an explosion. Ideally, it is a flame wave, initiated by the spark, which burns across the combustion chamber. This smooth burning generates the rapid rise in cylinder pressure during the power stroke.

Knock is the negative result when combustion occurs somewhere else in the cylinder, in addition to the plug. Like the spark-plug-initiated flame wave, the second wave expands so a collision between the wave fronts occurs. This collision produces a radical spike in cylinder pressure. Instead of a firm, even push down on the piston, the pressure spike hammers it down. This is strong enough that it can ultimately burn a piston, crack a piston ring or ring land, or a spark-plug electrode. These excessive pressure spikes can damage even engine bearings. When you hear a metallic rattle while driving, that is the sound of detonation and, in most cases, the cure is fuel with the correct octane.

One mechanical aspect that affects compression is the piston top. A dish increases cylinder volume, which reduces compression. In contrast, a domed piston decreases volume and increases compression. If detonation occurs, the piston top, ring land, or rings can be physically damaged due to the excessive pressure shocks created by colliding flame waves."

You may want to reconsider the domed pistons in favor of flat tops.