My 78 had over 200k on it. 3 colors of primer and bondo. A blue Z28 front bumper. Doors sealed shut so you had to jump up and slide in to get in and out... etc.
They can take a lot of abuse
It's gonna leak something and have defects that GM will ignore but that's part of all GM products it comes with the turf. (death cool / optispark / oil leaks etc..) Hey I can joke about them because I have had to fix it. Which makes a good side hobby.
They are easy to work on and this 5th gen will last forever if taken proper care of.