Youll need to bolt in an R32 crossmember if you want it to be bolt in, or use a mount kit. If you can find an auto KA transmission crossmember that also bolts up to the rb transmission. You may use the driveshaft providing it's a 5 spd.
As far as wiring goes, its not that bad. But it is more difficult than the SR. The SR is like one or two wires lol. The worst thing about it is theres something seven or more variations of the R32 RB20 harness so odds are you will have to piece your wiring together from different guides.
Of course it can be used for drift/DD. Why couldnt it? If parts availability is a concern though, go with the SR... Actually go with the KA-T

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Sounds like you need to do some more reading

. Good luck.