The grille-mounted park and turn signal lenses were amber; prior years had colorless lenses with amber bulbs. The interior rear view mirror was mounted directly to the windshield rather than to the previous double-pivot roof bracket, and the parking brake was now foot- rather than hand-operated. Disc brakes became standard equipment on cars built after 1 January 1976.
Several special models were offered:
-The Feather Duster featured lightweight aluminum parts including the intake manifold, bumper brackets, hood and trunk bracing, and manual transmission housing, for a weight savings of about 187 lb (84.8 kg)—5% lighter than a standard Duster similarly equipped. It came with a 225 Slant Six with its distributor and single-barrel carburetor calibrated for economy, a low-restriction exhaust system, an extra-high rear axle ratio, and was offered with either the Torqueflite 3-speed automatic or A833 overdrive 4-speed manual transmission. It was the most fuel-efficient car in its size class, achieving up to 36 mpg highway and 24 in the city with the manual transmission option. (along with Dodge's version, the Dart Lite).
-The Space Duster had fold-down rear seat and security panel and combined with the luggage compartment, offered over 50 cu ft (1.4 m3). of cargo space. (This feature was actually introduced, optionally, in 1973). The Silver Duster had special stripes and a cloth Boca Raton style interior.
-The Duster 360 option was deleted as a separate model as the engine became an option on any trim level Duster. the 1976 360-powered Duster (and Dart Sport 360) was still without a catalytic converter, and its power was down to 225 hp (168 kW).
Source: Wikipedia, 2012