Kombi, Break, SW

[voucht]

Hello Everybody,
I'm looking for a donor car, and here, in Sweden, station wagons (break as we say in French, or Kombi as they say in Swedish) are very popular.
So there are a lot of Sierra SW available for quite cheap prices when I look at the adds for 2nd hand cars.
I am wondering if, as a donor for the Haynes Roadster, it will make a difference to get the SW rather than the sedan ? Engine, gearbox, prop shafts, brakes, and so on should be the same, no ?
Other question, what should be, to your mind, the maximum mileage of the donor car ? My choice will be a 2.0i SOHC from after 1990.
Thank you very much for your help.