I think you will be fine.
Have a read of these threads:
http://www.skylinesaustralia.com/forums/topic/196307-te37s-for-an-r33-gtr/
http://www.skylinesaustralia.com/forums/topic/375570-te37s-for-r33-gtr/
SAU Member (ferni) R33 GTR
They are 18 x 10.5 +15, Nismo LMGT 4 wheels.
Just lower it till there is no tyre / wheel arch gap and you will be fine.