This 1966 Chevrolet Impala SS Hides a Mysterious Engine Under the Hood

The Chevrolet Impala SS is a car that has a lot of surprises.  

And this 1966 model is a car that has a mysterious engine under the hood.  

It has a black exterior, a blue interior, and a unknown engine that delivers unknown horsepower.  

This Impala SS is not only a stealthy, but also a curious machine.  

It has no badges or decals that indicate what kind of engine it has, and the owner claims that it is a secret.

It has a three-speed automatic transmission, power windows, and a tilt steering wheel.