Original back in the day was dependable and can
still be dependable today.

What people forget is that when an old truck or car
was parked and retired it was because too many things
were worn out on it.

The new owner, in this case you are not aware of all
the issues that have to be fixed. So in goes the new
battery, clean out the gas tank, put in fresh gas, change
the oil. Wow she started up and can move under it's
own power.

Call the insurance agent, down to the DMV, back home
with the plates and the new owner starts driving.

Then all the issues that were there get noticed and
need to get fixed. Which leads to the false assumption
that these old trucks/cars are not dependable. They
were and will be when you get everything fixed on them.
Jeffrey