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BigBoom360ci -> RE: year of 350 (2/4/2008 4:49:27 PM)
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That 3970010 casting number was used numerous years. I think about 6 or 7 years (some 327s have it) and it is an early to mid '70s number. There should be a date code on the passanger side of the bellhousing flange. Also the 350 blocks with this casting number came with 2 or 4 bolt main caps.
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