Can this LS3 head clean up?
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#9
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Then you wouldn't have to mill the whole head. You could simply smooth away the material in the problem area bc as stated, its not on the sealing surface.
#10
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I've seen repaired heads that had damage like that on nitrous drag race engines and lots of circle track engines and never had an issue. Just milled them to get flat, and any low spots not really an issue. You could smooth them out a little bit, but don't get into the fire ring area by accident when working on them.
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Nothing wrong with that head, aluminum is at least 3/8 thick in that area, just be sure not to mess with the sealing surface, you only need to take a sharp gasket scraper and take off protruding sharp edges, put it back in.