Many thanks for all this valuable information Marcus!
The car arrived yesterday. Started tearing it down a few hours ago. There's a lot to do. It seems the car was imported from Sweden some time ago, as there are stickers in Swedish on some of the controls (e.g. on the lights and wiper stalks), a Swedish make fire extinguisher, and a Bosch wiper fluid bag with Swedish text. Would love to know the history of the car, but there was 0 paperwork with it. It was repainted it seems once in its life. Someone had a go at making it driveable again recently, as there are new tires, brake hoses, coolant hoses and also the coolant and brake fluids are fresh, according to my little test strips. But, just about everything else needs attention. The plan is to take out the engine, tear it down to check all key components and also replace all gaskets (oil leaks ....), inspect all other components such as starter, generator, suspension, brakes, wiring, do the necessary bodywork, and repaint in original color, within the next 9 months, so it can be back on the road end of Q1 2021. We'll see. I will do the repaint myself here in my garage.
I like the access to everything and the relatively straightforward construction and mechanicals. The seller had purchased a reprint factory shop manual and, combined with the help from the communities you pointed me to, I should be able to work it all out. Yesterday I started the engine and it does run, but not too well. This morning I already saw the intake manifold rubber gasket is torn, so false air is coming in - no wonder it doesn't run right. Also the engine and ignition timing may be off. Well, to be continued.