Thread: MSD 6420 6AL
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Old 12-15-2012, 04:16 PM
  #2  
zipper06
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RACING JUNKIE
 
Join Date: Jan 2006
Location: La.
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Why :?: The 6420 will run anything you have with an added 2 or 3 step. I've run the 6420 on blown alcohol engines and have 2 of them. I also have a 7AL sitting on the shelf which i don't use, because i don't find it necessary.

JMO

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