Pyro install?
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I've got the 6.0 and I drilled mine from the botton without removing manifold. Drill slow and the chips will fall straight down. No problem with them getting inside. If worried, after drilling, vacumm the hole you made. Was also able to tap the hole from the bottom too. Took all of 15 -20 minutes to do complete job.
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Join Date: Sep 2005
Location: Ladner, British Columbia
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Port should not matter but by using the 2nd cylinder from the front on the passenger side you should have good probe access for the future when the engine is in the truck. Make sure you drill and tap the heavy area (looks like it was meant for a bolt hole) of the manifold. This way you take the least risk of possible cracking the manifold later when it gets hot.