The car would be authentic, built in 1967. What the person is asking is whether there's a technique to distinguish a car from 1967 from a sibling that was brought back from 2036.
Then if we put the 2 cars side-by-side, we should be able to tell if one is a re-VINed stolen car, or if they are both the same car.
I suggested we look at welds that were done by hand in 1967 to determine if the 2 cars were the same car.
Does that make sense?
One of the cars would be a few years old.
The other car would be about 70 years old.
Yeah?
Let's recheck your math. A 1967 Corvette would me more than a few years old in 2023.