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Old 06-29-2009, 10:40 AM   #4
mikajo39
Gearhead and audio junkie
 
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Join Date: Aug 2008
Location: nunyah
Posts: 452
Re: Spark plug gap with vortec heads/carb

Hmm well you could try retarding the timing a bit just to keep it from lugging, and headers won't really do much unless you have aftermarket heads,cam, high perf intake, and a peformance carb. If its just stock with 10:1 CP than headers wont gain you much.
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