1968-1971: Top of instrument panel, drivers side, visible through windshield.
This particular VIN tag would be deciphered as:
164 = Series: Impala SS 8 cyl. 67 = Model: 2 door Convertible 6 = Year: 1966 C = Southgate, CA 100368 = Production Sequence: this car would have been the 367th car produced in 1966 at Southgate Assembly.
More about Series and Models will be included in the Cowl Tag section.