Thread: GM Aluminum Block Small Block Chevy Casting 0 359198
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Old 01-05-2022, 04:38 AM
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PeteLeathersac PeteLeathersac is offline
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The Numerical thing makes sense until proven otherwise.
O-172978 is the 63? Alcoa Casting Cerv. Block in the 'Vair link.
Anything on the Bore/Stroke of your engine yet Jason?

~ Pete

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