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Old 05-18-2010, 11:15 AM   #12
'72customdeluxe
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Join Date: Jan 2008
Location: Tejas
Posts: 691
Re: 283 heads on 350

Instead of experimenting and tearing it doWn just play with the timing. For around $180 you can get a wideband o2 sensor kit which will let you know your exact air/fuel ratios and what you need to do to tune.
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'72 cheyenne super step, '05 long bed gmc
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