Edelbrock heads on a 340 with KB243 pistons

yellow rose said

Run the .070's.

I'd bet all I have that no one has done an A-B-A test to see if .040 quench is better than .050 quench.

You won't see a pinch of **** difference. Why squeeze it so tight? To say you did it?

Much ado about very little.

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I'm with you, I don't think on this motor it will make a bit of difference, I doubt I'll be changing the Pistons since it's assembled and balanced, as far as that goes I could run the .028 gaskets and the open chamber iron heads I have. I haven't worked up the compression on that combo yet.