ive got a r34gtr skyline at the moment, there a good but dont believe all the hype , to mod it in any way your looking at a shed load of cash, a descent lump and box will set you back around 4k , then you need all the rest of the electrics to make it run,, however the scoob may be a good choice, a 95/96 or such jap import sti spec scoob will blow your socks off, youll need to uprate the oil pump but thats about it you can get them for about 5k strip out what you need then sell off the rest, should be able to do it for around 3k,
the scoob i had a 98 version 4 sti import is was far quicker than my skyline gtr34 to 110 and alot cheeper