mods? not sure what you mean?
I have a set of 356mm on the 350z (well did, I just sold it) for about 2 years, straight bolt on, no problems.
I have a set of 356mm on the new race car but it hasn't run yet. straight bolt on.
I have a set of 330mm on the stagea under 17" rims. These have been running for at least 3 years and are second hand off my race car. 3rd set of pads, first set of rotors, absolutley no issues. I did have a minor issue with installation, it is a 32 gtr kit with m12 bolts but the stage hub allows m14 bolts. Added a small sleeve. Also had to trim the brake backing plate.
aleks, sorry not sure but you would need VERY generous internal size to run 356 under 17s. The only one we got to fit, and only by 1mm was a set of weds. Also required adjsutment to the caliper mounts and the caliper, but it was a race car so who cares. In practice....330 17"+, 356 18"+