Just got my head back from Group K. I didn't bother measuring squish band. Mid summer it tested at 150-150...., just installed last night, 170-167. I'm pretty happy. Will use 91+ octane gas as recommended per Group K.
I'd buy a new ADA too. All said and done, you will have wasted 100 bucks polishing a turd (Stock head.) It's a good investment for the future, and with the stock milled head, you still run a risk of the cylinder cracking.
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