I'm hopeful that you'll post your progress on this project, as I've been entertaining different ways to get more performance from my euro 123 coupe. Even with the euro-spec M110 it just doesn't offer what I'm looking for, performance-wise. I've considered a V8 conversion, turbo-charging and super-charging. Super-charging would be my first choice (lag-free, and can be returned to stock fairly easily), but never having owned or DIY'd a non-normally-aspirated engine, I'm a bit concerned as to my ability to design something that would be built largely from scratch. I look forward to whatever information you might decide to post as you move through this.

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"Diplomacy is the art of saying 'nice doggie' until you can find a rock."