Upgrade to Euro Spec

I'm curious as to what's involved in liberating the full 320bhp from the US spec E36 M3.

Here's your opportunity to expound on this (undoubtedly) popular subject!

^-- lump?

I dont know enough about the subject but the head is different, it has different intake manifold, 6 throttle bodies, different valvetrain and vanos, different tranny, a whole different intake system, and probably a different headers to tips exhaust system. The block is probably the same.