Run the comparative prices in gold and silver.
Gold is 1300 today.
In 1968 Gold was 39, but that might have been under government control at the time, so I’m not sure if it will be a free market comparison.
In any case, it’s 33 times more today. That says the Chevy should be about 125,000 today, so something is obviously wrong with the value of gold in 1968.