Engine Builders-KB356 Piston Milling

I appreciate all the replies! Not the news I was wanting to hear but would rather know exactly what I am dealing with. Looks like a conservative tune, 160* thermostat, some 93 and some octane boost each fill up will be what my formula is. Will try and find a thicker head gasket but at the same time I am opening up my quench area in doing so. I think short of ordering a custom cometic, or opening up the chambers on my cylinder heads I dont have many options.

Leave the thermostat alone. It should be a 180 or 195. A 160 will do nothing to make it run cooler.