Quench Vs Piston To Head Clearance

I'm trying to learn as much as I can on this subject for my first engine build. My 1970 340 engine has the original open chambered cylinder heads. I intend to use them on my rebuild. I understand that because they are not closed chambered I won't have quench possibilities. What can I do with the stock heads to reduce potential detonation?
im no smallblock guy but I think there is a step piston like rusty and and were talking about from KB. I know they have them for the 440's, we have them in my dad's motor. if I recall they called them D steps