Err, squish should be 0.5. Never got that high a reading on the dyno I use, but hadn't redone on that dyno since Sketchy reshaped the head.
Don't remember it falling off quite so steep, but certainly was never ideal there. Sub ex ports were left close to std size as this was done well before I'd seen a modern barrel with enormous sub's. That would have to help blowdown and overrev, but mean a replate.
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