Recently became the proud new owner of a particular brilliantrot e30 e318is (+turbo). When I bought it, the diff was making noise, the clutch was (and still is) slipping due to a cheap replacement, the short shift lever was grinding on the driveshaft and it failed a warrant due to the missing highbeam. I've since fixed (or had fixed) all but the clutch and just on the hunt for a decent road clutch that'll take the power it's putting out.
I believe the motor was done by Kayne Barrie (or one of his apprentices) in '03 and has been through a few owners in and around Auckland. Here for the knowledge and the know-how that graces these forums and hopefully attend a few meets.
Sorry for the shitty quality I-phone photos.