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I would replace the header gaskets. Even though they are steel, they have already been compressed where the head & header meets. Therefore they wont seal as well.
Make sure you use new cylinder head bolts.
If your valvesprings are weak, this would be an excellent time to replace them.
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F-Bodyless 
01 GMC Sierra C3 6.0L, AWD, Westers Tune, K&N, Hella LED Tails
03 Pontiac Grand Prix GT, GMPP Handling Kit, LS1 F-Body Brakes
Last edited by Mark B; 09-26-2008 at 11:35 AM.
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