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                I just bought an original 1957 FEH Distributor. The Vacuum Advance Unit uses Springs and Spacers to adjust the amount of  Advance and Rate I assume. How does this System work? "Greenbird56" Steve Metzger can probably explain it if He sees this Post. Thanks          
			     				
			         
               
                                                                                               
                                  
               
           
                    
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