How many miles should a 1976 car have on it?

On averae a car is typicaly driven 12000 miles a year. This is why manufacturers provide 3 year or 36000 mile warranties. As of 2011 a 1976 would be 35 years old. 35 years times 12000 miles would put the car at 420000 miles on the odometer. If it has been driven on average for all of it's life