I had a ‘79 suburban I bought new and got over 300,000 miles when I sold it. Sold it to a local fishing guide who used it to tow his fishing boat.
The barn find and long sitting K5 has about 255k on it but pretty much zero oil control now.
It started deteriorating a few years ago but it sat way longer than I planned.
A replacement engine was always in the plan for it. I got it cheap enough.