I used the R32 caliper (300ztt and 200sx) and looks markedly different to the later ones, they have a fin sort of arrangement, so I'm pretty sure that if you get the rounded looking ones you will be right.
The R32 ones are designed for a 280mm disc and this can be done with a 10mm spacer between the caliper and mounting point. So if you use the original nissan disk size with this caliper, that's OK. It won't work with the 300mm ones