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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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                Mid '56.          
			     				
			     Lawrenceville, GA 
               
                                                                                               
                                  
               
           
                    
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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 or was it superseded?           
			    				
			    
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	            Group: Forum Members 
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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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                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          
			    				
			     Lawrenceville, GA 
               
                                                                                               
                                  
               
           
                    
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	            Group: Forum Members 
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                we know that.im looking for the date          
			    				
			    
               
                                                                                               
                                  
               
           
                    
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