for the discs, another option is to use R33 non-turbo (4-stud) discs. these fit straight on as well with the calipers.
couple of similar pics. R32 calipers, S13 hubs, S13 coilovers, R33 non-turbo discs.
i also cut off all of the stone guard off the back of the hub but you could probably just trim it to fit.
and if you are running a banjo-style fitting. no worries, just shorten the banjo bolts!
These are series 3 Bluebird banjo bolts. thread was the same as the R32 caliper, just used the hack-saw to shorten them, allowing the standard brake line to bolt on to the caliper