Just playing devils advocate here. If the head was ported out to add the lumps and the head bolt jacket removed, wouldn't it be to large a chamber without the addition of the lumps? I have prepped a head for the lump port install and you must remove a vast amount of material to complete it..

Last edited by TUTS 59; 12/18/2024 12:47 PM. Reason: spelling
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1958 Viking 4400
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