fenders and rocker panels. New models were introduced: GT estate wagon, Cabriolet notchback (with a half-vinyl roof and opera windows similar to the Monza Towne coupe), and a limited-edition Nomad wagon with restyled side windows. New options included BorgWarner five-speed manual overdrive transmission and houndstooth seat trim named "sport cloth" at an additional $18. A "Sky-Roof" with tinted reflecting sliding glass and an eight-track tape player were options from January. The Cosworth was canceled in July after 1,446 1976 models were built. For 1977, models had few revisions. The notchback was renamed "coupe". On the Dura-built 140 engine, a pulse-air system met stricter Federal emission standards. The single-barrel engine and three-speed manual transmission were dropped. Interiors received a color-keyed steering column, steering wheel, instrument-cluster face, and parking-brake cover, with a color-keyed full console a new option. The GT models received black, exterior moldings (lower moldings deleted), black, sport mirrors and wheels, Vega GT bodyside and rear striping as well as a Vega GT ID Engine The Vega engine is a inline-four with a die-cast aluminum alloy cylinder block, cast-iron cylinder head and single overhead camshaft (SOHC). The block is an open-deck design with siamesed cylinder bores. The outer case walls form the water jacket, sealed off by the head and head gasket, and the block has cast-iron main bearing caps and crankshaft. The cast-iron cylinder head was chosen for low cost. A simple overhead valvetrain has three components activating each valve instead of a typical pushrod system's seven. An external belt from the crankshaft drives the five-bearing camshaft plus the water pump and fan. Compression ratio for the standard and optional engine is 8.0:1, as the engine was designed for low-lead and lead-free fuels. The single-barrel carburetor version produces ; the two-barrel version (RPO L11) produces . From 1972, ratings were listed as SAE net. The engine is prone to vibration, which is damped by large rubber engine mounts. The 1972 Rochester DualJet two-barrel carburetor required an air pump for emission certification and was replaced in 1973 with a Holley-built 5210C progressive two-barrel carburetor. The 1973 emission control revisions reduced power from the optional engine by , and its noise levels were lowered. A high energy ignition was introduced on 1975 engines. Serious problems with the engine led to a redesign for 1976–1977. Marketed as the Dura-Built 140, the new engine had improved coolant pathways, redesigned cylinder head with quieter