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            By darrell - 6 Years Ago				
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            THIS MAY HAVE BEEN COVERED BEFORE BUT WHEN DID THEY STOP USING CORE PLUGS IN THE HEADS IN 56.IM GUESSING AROUND MAY BUT THATS JUST A GUESS.JUST WONDERING.TED OR JOHN MAY KNOW.
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            By charliemccraney - 6 Years Ago				
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            Mid '56.
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            By KULTULZ - 6 Years Ago				
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            This is an interesting subject as to exactly when FORD changed the casting molds and did the later head carry the same CASTING I.D. NO. or was it superseded? 
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            By darrell - 6 Years Ago				
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            we know when ford posted heads put the slinger on the crank.just like to know when it was done.not importened just wanted to know.
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            By charliemccraney - 6 Years Ago				
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            The '56 ECZ-C heads can have the plugs or not.  Early had them.  Late did not.  So it occurred somewhere in the course of producing the '56 model year vehicles.
  http://forums.y-blocksforever.com/FindPost131912.aspx 
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            By darrell - 6 Years Ago				
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            we know that.im looking for the date
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