Quench Vs Piston To Head Clearance

Wherever the piston would contact the head FIRST if you pushed it up the cylinder into the head is quench distance, or piston to head distance, regardless of the type head you have. MAYBE the only exceptions would be pistons with grossly exaggerated domes that would hit the head before the flat opposite the dome. I think those situations are few and far between. They would not be able to have quench, period.