Thread: NOS Chevy "factory high performance" 307 engine?
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Old 06-15-2016, 02:45 PM
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Default Re: NOS Chevy "factory high performance" 307 engine?
The casting marks on the end did't look like 186 markers. I guess these are 1.94 valves too since a 2.02 needs a bigger bore. It is an interesting combination!
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