nigel, i think you've been mis-informed. r33gtr is 12mm so will bolt up to r32/r33 etc no worries. it's only r34gt-t and r34gt-r that are the 14mm bolts and require modding the stub axle.
chris, they will be a direct bolt on for you mate, i can't remember how much clearance the racing harts have - just check how much room between the back of the spoke and your current caliper and let me know what it is. even if you can't fit it, we know those wheels could do with 25mm spacers anyway
did you even read the first post mate? lol it says front only haha