Many changes occur in’66 for the Chevy II with the car being more angular, the grill bolder, slightly humped rear fenders, a slight angle to the rear end, with a semi-fastback roof line. The car also has vertically lined up tail lights with a set of single headlights in front now mounted in the grill. The entry level offer is the Chevy II, the next step up is the 100, while the 400 is the uptown version. The top offer, in sport coupe only, is The Nova SS and comes with a 194 cu in (3.18 L) inline six although any Chevy II engine could be ordered for the SS. Bright aluminum deck cover, wide rocker panels, special wheel covers (identical to the Malibu), Super Sport script on the quarter panels, SS badging on the grill as well as on the side panels distinguish it as the top of the line. The SS package also includes the Strato bucket seats and a tachometer is an available option. The car is still called a Chevy II but all the markings now read Super Sport and Nova SS.

Chevy II in the 100 version is the only model with the four cylinder but it could be upgraded to a 194 cu in (3.8 L) inline six, or a 230 cu in (3.8 L) inline six. The V8 engines available in 1966 are a 283 cu in developing 275 hp (205 kW), a 327 cu in (5.36 L), or the new Turbo-Fire 327 putting out 350 hp (260 kW) and coupled to the close ratio geared four speed transmission turning the Chevy II into a formidable muscle car. The Powerglide transmission is an option but not for the 350 engine.

Very few changes happened in the 1967 models on the bodies but a cross hatch pattern fills the trim panel on the deck lid of the Nova versions and the basic Chevy II lacks many of the chrome features on the other models. Safety upgrades are made to the interiors of all the Chevy II line including impact absorbing steering column, safety steering wheel, recessed instrument panel knobs, front shoulder harnesses, padded interior items such as armrests and the sun visors. The hardtop Nova SS does get a new black accented anodized aluminum grill and this year sports wheel covers borrowed from the Impala lineup.

Power train options are the 194 cu in (3.8L) inline six, a new 250 cu in (4.1 L) inline six, and the 283 cu in (4.64 L) V8. The most power full option is a 327 cu in (5.36 L) V8 developing 275 hp (205 kW). The Nova SS coupe have a console mounted transmission with a choice of the four speed standard or the Powerglide automatic with the other models all getting a column mounted shift. The sales dropped for the 1967 model year with the six cylinder versions by far the most popular choices and only 8% of the total Chevy II models sold in 1967 are the Nova SS equipped with the V8 engines.