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Old 03-25-2024, 02:15 PM   #9
THI
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Join Date: Jan 2017
Location: Traverse City, MI
Posts: 221
Re: Hairline Crack in LM7 5.3 Block

https://www.summitracing.com/parts/m...iABEgInZPD_BwE

I used this on a 350 Vortec that had cracked heads, it worked great. I was told to try that by a machine shop owner, he used it on a 400 SBC dirt track engine that he ran for three years before he over revved it and put a rod through the side of the block!
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