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#1
06-15-2016, 04:06 PM
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Re: NOS Chevy "factory high performance" 307 engine?
Those look like <span style="font-weight: bold">185</span> heads, which would be correct for a '69 200hp 307. 69cc chambers, 1.72/1.50 valves. Not a performance head. I'm guessing the extra hp was from the Q-jet and intake + *maybe* a cam??
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