Thread: 283 heads on 350
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Old 05-17-2010, 05:44 PM   #2
'72customdeluxe
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Join Date: Jan 2008
Location: Tejas
Posts: 691
Re: 283 heads on 350
having 7 degrees initial timing can't be helping your cause. Bump it up to atleast 12
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'72 cheyenne super step, '05 long bed gmc
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