it will start off as a very expensive thing to do and the costs will just pile up from there on mate.....do what penny did.....sell the skyline and get a WRX .......from where i look at this is....your options are:
1 - sell yours and get a 33 GTST
2 - swap the motor, do the brakes and go via regency
3 - turbo your motor (very very expensive)
personally i would go with either 1 or 2