What internals from a K04 turbo is needed to make a K03s hybrid? I've seen machined out comp housing to match the bigger wheel, what about the turbine side? And what else is done etc? What would be the ideal donor turbocharger?

No-one know?

im intersted in this also. ive a spare k04-32a sat on my toolbox ready for either a buyer or my k03s when its due a rebuild. depends which comes along first lol.