Bitter_Sweet

hey all, I'm hopefully picking up a series 1 r33 gtst in the coming weeks and wanted to know what are the main things to look at replacing (apart from all fluids, filters, plugs etc) on it being that is has sat for 10-15 years in a shed. I have been looking through the forums but cant quite find what I'm looking for. goals with the car are for it to be a weekend cruiser so anything that can be updated when replaced for it to run more "efficient" so to speak would be good to know. cheers!