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Old 02-05-2011, 09:50 PM
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75chev4x4 75chev4x4 is offline
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509 on block

Hey Guys have a few 350's and cleaned one up tongiht to get it ready for the machine shop. Its the common 3970010 and has the .10 and .20 on the timing cover which some say has high nickel, but nobody knows for sure. Anyway it also has the 509 in between on the timing cover, is this anything significant to the block or make it special in anyway? Doesn't really matter much I think I will use it if it checks out ok, just think all the history on the small block casting stuff is cool. Thanks for any info guys.
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