Ideally hoses. Seems a waste not to with all that new found stopping power
. I 'think' you need 300ZX rear hoses, or get custom. You dont need the hubs as they are the same. You will however need to split the rear bearing carrier from the hub knuckle to fit the GTR/S13 backplates. The backplate holds the drum handbrake assembly in place. It is NOT an option, you will NEED to fit it. You can use the S13 ones if you want to just trim the outer edge of it out fo the way, or use the GTR ones for neatness
Maybe an idea to fit a 300ZX master Cylinder at the same time to give a better pedal pressure too
Thats about it mate