Engine long block is back in. Hydraulic clutch feels good again.
Test mounted intake (picture) to mark the spot where to install the waterinjection nozzle.
Since my old controller had a short and no replacement parts were made for it anymore (...), the quick and dirty solution was to get the newest kit.
Unfortunately, I really could not reuse even some of the old installed waterlines (slightly different outer diameters), so had to removed all of the older wiring and waterlines... grr! Hate to do wiring, but had to.