The 1967 Chevrolet Impala SS – Muscle Car 2020 Review Author Jon Skinner | 9th March 2019 Quite aside from being the year in which the Chevy Impala SS entered the US car market, we remember 1961 for featuring other legendary events, such as JFK becoming the 35th American President and Yuri Gagarin becoming the first human to successfully complete one orbit of the Earth. 1961 also introduced the 409 engine into a Chevrolet vehicle for the first time. Though it is the ... View