1. 

   1970 STAGE 1 Well-Known Member

   GM factory installed advance unit . Part number 1973440 . Used and in excellent condition. Holds vacuum . These factory advance units have a flat face where the advance line is. Replacements look different, face has a ring pressed in it. Scott 918 381 1234 $ 75.00

    

   1970 STAGE 1, Jan 11, 2019

   #1
2. 

   1970 STAGE 1 Well-Known Member

   

    

   1970 STAGE 1, Jan 11, 2019

   #2

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