Here are some pics of my old car, should never have sold it!
Was an e30 83 323i , then i installed an nissan RB20 turbo engine and box. It had the smoothness of a bm but the go of something else. Was great to drive, but didn't like driveshafts when sticky tyres were fitted.
hope you bmw fans are to angry about the swap, but i couldn't afford an M3, and this would have flogged a standard one.