We routinely run work vehicles, gas engines all, too 200k and generally its oil changes and brakes, and thats it. Mine had a transmission flush at 175k. We have had issues on Fords with the Infotainment system. Take them in, and company says "we aren't paying $1500 to fix a radio", we'll, its not a radio, its your AC, cameras, crash warning, ect.
Even a 1980s vehicle; 200k would be the exception, and likely would have had tune up every 50k, u-joints, shocks, alternator, plugs, and likely more. We dont even generally replace belts within that 200k, and often dont need an alignment.
Now, I have Zero experience with 1960s stuff; but 80s and early 90s; people forget just how underpowered 350s, 360s, 5.8L, really are. Yes, Ford 4.9L were good for their time, but they are dogs against even a 2.4L I4 from today, in weight, power, durability, ect. Heck, look at a "hi output" 454 BB; put that against even a 3.6L V6 dodge