it already sounds like you have everything you need to go drifting mate...hks hypermax will make it a lot easier to drift... i dont know what scathing is talking about but it will have a lot less body roll with the coilovers...i assume your diff is a viscous type lsd which should be fine for your first time out however if your going to get more serious i would suggest a 2way lsd as they are so much better making rear movements more predicatble, along with removing and locking your hicas bar...just running stock skyline wheels on the back will be fine either 16's or 17's...most importantly go out and have a thrash and enjoy yourself without having to look over your shoulder for the po po!!