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I wouldn't if you can use a straightedge to make sure its straight. Whenever you remove material from the head, you also have to remove it from the oil pump, and that constantly gives people problems (oil leaks at the front of the engine are common). furthermore, it lowers the camshafts/gears slightly, making the timing chain have a little more slack, and this can change your camshaft settings I think. iirc it retards them slightly for some reason. I dont remember why though.
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