Intro and Question on Nissan recalls / recommended service centres

[GaryXCY]

Nissan Recalls / Recommended Service Centres

Hi, am new to the site, not sure where I am supposed to put my introduction. I own a second-hand patrol gu series III zd30ddti with the recommended engine upgrades, which, are in obvious view when the bonnet is lifted. I do most of the basic service work myself, and have a mechanic that does the heavy duty/technical work. A short while ago, I rang Nissan about service work, and had been told by the service centre that they do not service or agree with modified vehicles, which makes me cautious about leaving my vehicle with any Nissan dealer. I was also planning to register the VIN number of my vehicle with Nissan to ensure that I am advised of any recall issues. Would anyone be able to confirm 2 things:

1) if Nissan would have a legal obligation to honour recalls, regardless of whether a vehicle was modified or not?
2) would anyone know of a Nissan service centre in South Australia that does service work to modified vehicles?