I deleted my egr and it came with a drilled and tapped hole in the tube. but i would say the easiest spot for the boost would be right above where the IC tube connects to the alum. piece (intake bridge intake manifold whatever its called) that way you can just pull the plastic tube off and the metal shavings fall out. as for the egt the exhaust manifold has a flat spot on the back of it thats perfect for the probe.
passenger side manifold towards the back of the engine youll see a flat spot, just make sure to give yourself enough room to tighten the probe coupling with a wrench and its not to close to the stud