I did the swap last summer... while its out I would change hard to reach gaskets and rubber horses and 60k or 120k maintenance ..but the injectors could be changed easy while its in and the intercoolers...def do down pipes ( they could be done while motors in but MUCH easier while motors out ...get a good flywheel or resurface stock one and new clutch and if jdm motor look at oil pan see if any dents from sitting if so replace ...hope this helps and if need any help message me or search this place and google walked me threw the whole thing ...love tt.net