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Old 01-18-2018, 01:04 PM   #6
geezer#99
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Join Date: Aug 2009
Location: Bowser
Posts: 9,557
Re: Vacuum advance 83 454

It’s the same up here.
We had to reduce the timing on my old 67 250 to 6 degrees from 14 and lean down the mixture screw a bunch to pass.
I don’t understand there thinking. Running it like that creates more pollution. Fine tuning saves gas and creates less pollution.
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