I think the biggest problem you're going to encounter is the fact that the right-hand drive Fugas have the button layout flipped from the Left hand drive M's. Even for the climate control functions. So unless you can find a right-hand drive Infiniti M button pad, I'm not sure it'll be very functional. And as far as I can recall, all of the countries that get the Infiniti vehicles vs. the JDM cars, are all Left-hand drive. If you're handy with wiring, it probably won't be a problem. You're probably going to encounter issues with the wiring harness seeing as Infiniti's use traditional GPS nav services, and the
Fuga's use "
Carwings" pay service, etc. So they are more than likely wired completely different.
I may be WAY wrong and off base here, but at any rate I hope you're able to do it! It sounds like it would be a fun project