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yup. that's it. keep all the 03 stuff together. and yes, icp is on PS valve cover for 05.
transfer the 05 icp sensor as well. the late ones function the same as early, but are much less prone to leaking. and replacing that sensor with the engine out is a whole lot easier than when it's in there.
just a little info though for you on the differences of the engines;
the 03 HPO pump is much more prone to failure and operates a lower pressure than the 05. however, the 03 engines HPO system was less prone to HPO leaks. probably partly due to the lower pressure. also, the egr cooler on the 03 is a better design, with a much lower failure rate.
IMO, the 05 is a much better engine. so long as the HPO updates are done and egr is deleted.
the richest ones are not those who have the most, but those who need the least