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Stepping up my 8-71 roots blower on 352ci. small chevy to 16 to 20 lbs. of boost on E-85. Would like to know what gap should spark plugs be at????? Thanks in advance......
 

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.018" would be fine.
 

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I found on our car the tighter we made it the better it ran and we're currently down to 12
 
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