Re: First truck project! 89 Silverado 5.7 350 V8!
The thicker the flange the better, if you don't go with 3/8' flange I would think about these http://www.summitracing.com/parts/JEX-FLX3010B/
Nothings worst than spending all that money and 6 months later you have a warped or cracked header, plus for the price they look really cool.
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I Saw Elvis at 1000 Feet - John Force
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