The Chevy Impala is an awesome car!  Have you ever owned one?
I never have, it was Chevy's most expensive passenger car model through 1965 and had become the best-selling auto in the US.
Really!  I didn't know that!  Was it considered a luxury car at the time?
I'm not really sure on if it was considered luxury or not, but the Caprice was a top-line Impala Sport Sedan in 1965.
Do you know what size engine that was in the original Impala?  It must have been high performance if the car was considered a sport sedan.
Between 1994-96 it was a revised 5.7 liter V8