Paul confirmed the squiggly lines represent turbulence - shallow and big representing less and more. At the big line turbulence was enough to where he couldn't keep the manometer at 28".
He indicated the casting is clean with no porosity. Intake cleanup can put the flow at 300 and a good valve job on the exhaust can likely raise the numbers to 220. Exhaust seats weren't cut deep enough which resulted in heights about .050" shorter than the intake. I feel like I've read similar measurements from others, I just don't recall where.
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