A small update.
I did some performance tests and I can see a consistent 50-130km/h in 8.9secs (3rd gear and full tank).
I got the adapter from Turner motorsport that is needed for installing the throttle butterfly on the M54 intake.
Soon I will install the M54 intake and then I will re-run the test.
In the meantime I came up with a plan for the supercharger project