Sorry to hear that your father passed.
Original parts, such as the ball on the shifter are always a good thing to have - look for it, and at least make sure it stays with the car (maybe in a box in the glovebox).
The door seals are not going to be cheap - check the windshield seals as well....if they are getting old, they'll let water in, and if you have a wood windshield bow, it will get ruined (plus you really don't water in the interior anyway).
Being able to adjust your own valves is a plus. Couldn't comment on the carbs, but if you do a few searches, I am sure that I recall posts about adjusting carbs on these cars.

Enjoy!

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D