The spindle on the S13 knuckle is smaller than on S14s so the hubs dont swap. A pity really as it would make a 5 stud swap so much easier. Dont know if sleeving it would be possible or safe but Ive never heard of it done so probably not.
If the spindles on the geomasters are bigger than the S13s, its only a case of throwing the hubs on a lathe and machining them to size if your really stuck.
Be more awkward if it was the other way around as you would have to go sleeving them which isn't the most favorable option.
The 4 stud hubs off of others if worth a look at I would have thought, lots of r32,33,34 had 4 stud.
I'm not too worried at the moment as my car handles just fine as it is
Have a chat with Ian at I A Motorsport chaps. He can get hold of the appropriate bearings etc to make this work and has done so on his PS13. If I remeber correctly it isn't overly cheap, but is cheaper than 5 stud and you can keep your wheels
lol you guys! come on!!! its not rocket science !!
IT CAN be done !! actualy it is already done , tomorow when i get to the garage ill take some pictures for you of a customer/friend RB30 S13
The 4stud hub came of an old model of the S14 cant remember which one exactly now.