Thanks for the warm welcome!
@lupo_ro, it's not a swap, I rebuilt the engine with new parts: bearings, piston rings, valves and seats done, oil pump, seals, gaskets, crankcase breather, timing belts a.s.o. After some issues with the clutch disc on the first try to install the engine I took all out again and installed again using a new disc (Topran, it was KM in the box). Finally started the engine yesterday evening, seems to sound well. It was a short run, no coolant and radiator hoses missing, no exhaust only header with first kat so it made a bit of noise. Have to clean the inner axle joints, change an outer boot and install gear shift linkage today and maybe take it to a drive.
VID_20181227_204306.mp4