Re: 283 heads on 350
Quote:
Originally Posted by cppursell
up to 12? Okay, I'll give it a try. I had it set there 'cause an old mechanic buddy of mine said to set it between 6 and 8.
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the gm timing settings were for emissions purposes I believe. That's not anywhere near ideal
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'72 cheyenne super step, '05 long bed gmc
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