If CR is a modest 9 and fuel AKI is 92 (?)
Then Figure (b)
Shows that full throttle ignition timing can be less advanced
And that should yield some power and torque gain
... but like said above
those graphs are for 2000 rpm
and we really need to see the equivalent figures for
4000, 5000 and 6000 rpm.

I ran the KB quench pad pistons in my old 440 combo as I used 906 heads. I do remember I had to buy .074 Cometic head gaskets to make it work. My heads had been milled already and my combustion chambers were right about .025 deep. My quench pads were .054 above the deck. So when I used the .074 gaskets with .054 quench pad above the block I had .020 from the gasket and the .025 deep chambers as I had right around .045 quench. The comp came out right at 10.0 and I can tell you I ran 92 or 93 pump in it with 36 to 38 total timing and it did not ping or detonate at all. In fact the eng is still running in a Duster and running fine on the 92 pump. Ron

A tight quench is mechanical octane!