Buy Audi 80…

Moin So I play an Audi 80 as an inexpensive youngtimer. Preferably the 2.0/2.3 liter machine. However, would you have asked a few questions: Given the proportionally large engine capacity, the engines should already be relatively stable… can one still add extras at 200000km mileage? Does someone have some experience with it? And above all, how much can one still put on the volverzink body after the long time? a few hints and tips or purchase recommendations would be super helpful, because I look really old in the topic Audi … thanks already in advance and sorry for annoying!