High Compression/ Boost on the street...

[Twoblackmarks...]

Maybe check your cranking compression to get an idea where the low RPM pressure will be around?

As cold plugs as possible and a real lazy ignition curve. Try no hotter than 8s if NGKs, and ensure a real good spark.

And the air temperature the engine sucks in has a big impact on knock and performance anyway, try to get it from outside of the engine compartment and keep heat down under the hood.

I would guess the worst "knock" situation would probably be at low to mid RPM under a bit load. like under 3000RPM.

A SMALL amount of knock most engines can handle, but it is the pre ignition that kills. Maybe get an oxygen sensor to look at lean spots, to insure engine gets what it needs.