i guess ill chime in...
06 WRX EJ255 into a 00RS..
did the full drive line with interior swap as well so used about 90% of the WRX harness and just had to re wire the fuel pump tail lights doors and sunroof/dome/map lights... wasnt too bad though fairly straight forward if u have access to the wiring diagrams...need to tweak a couple things like my dash beam and then clean everything up yet, but functionally i am good to go!!!
lots of mods on her too...plus she will be flared and painted up shortly as well
the hood is off of my DD which is Sedona Red Perl...i traded my hood from this car for an L hood as i have a front mount that just needs the piping tweaked and then ill be rockin a 9K vent