im with most of the other people on here dont bother doing engine swap! just not worth it.
another option would be to buy a r32 gts-4 there turbo, gtst brakes etc etc.
iv owned one for over a year now and love it, s*#t loads on fun in the hills and on the track, handles great
doesn't hav the go of a GTR but you can pick one up for what you sell yours for with abit of change leftover
(if you got 10k for it) to spend on it......