Edelbrock Heads Sound Like They're Terrible

pishta said
Edelbrocks are still sand cast, Professional-Parts (Chinese) are steel molds, hardly any core shift, much tighter tolerances. Still look them over for casting flash though. I believe they are worth it. But could they have the CHINA on the bottom in any larger font? Its HUGE!
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Pretty sure you can only use the moulds on the outside...still have to use sand for the internal passages and ports....unless you know of a way to extract steel from compound curvatures within aluminum without destroying the casting that was just poured.