Theres more info on club S12 but S14 fronts can be done if you use after market coilovers (I don't think they will work with the standard front strutts)
I'm not 100% sure but are some facelift S13's 5 stud? If so then they could be used also.
The rears are more of a chore because you need to use the Z31 rear arms/hubs and they don't come up to often.
Stud Pattern converters are an OK so long as you adjust the offset on the new alloys properly, although they don't seem to be the safest option.
Changing the front hubs would open up some brake conversions too.
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