Actually it's around 80000th (29x29 letters x 100 numbers)
I've never had a shred of doubt about going on a long trip with my Typ43. I've even felt more confident than in a modern car, where if an electronic component decides to die on you, you're stranded. Basically my checklist is as follows:
1. Ensure that all major things are tip-top, so that your head gasket doesn't blow on the road, your wheel doesn't fall off
, or something as catastrophic as that. Everything else can be resolved.
2. Know your car well. Be comfortable performing some minor repairs on it, so you can do it on the side of the road. I guarantee that no decently maintained Typ 43 can encounter an on-the-road defect that cannot be resolved within an hour if you know what you're doing.
3. Know what can fail, and have those parts with you. For me it's the commutator (the only thing that can die unexpectedly and leave you stuck), an extra set of ignition leads, voltage regulator, some grease, bottle of engine oil, etc. I also carry a few spare pieces of hose and clams, just in case.
4. WIRE WIRE WIRE. Always have wire in your old car, for me this is as important as having a spare tire. Have both types - electric wire and regular steel wire. The first can save you if something goes due to old age (a wire leading to your engine fan becomes brittle and cracks, for example), and the second is good in keeping things together for a short while. I had a situation where a brass pipe on my Wartburg's cooler (the one that leads to the expansion bottle) simply broke off and the car began loosing coolant. I managed to isolate it with some waterproof tape and keep it in place with a piece of wire until I got home.
I'm planning a trip to Sweden to Power Big Meet this summer, in my 1970 Cadillac. Same precautions as above, and I hope we'll be fine