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Old 11-15-2010, 10:53 AM
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what are these heads for? help?

i need to identify some chevy aluminum heads. 10820748k047 & 11110552l087. the also have these casting marks lo57 on 1 haed & j317 on another. i believe they are ls1 heads, but ive been told they are ls2 haeds. they have a date stamped into them 11/17/97 can you help me

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Old 11-15-2010, 12:07 PM
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The LS2 didn't come out until 2005 so if the date code is correct its not them. Likely ls1 because that was the only ls based engine that had aluminum heads at that time.
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