Dodge Dart GTS
The 170 cu in (2.8 L) Slant-6 engine remained standard equipment, though its power rating rose from 101 bhp (75 kW) to 115 bhp (86 kW) for 1967, owing to the installation of the 225 engine's larger carburetor and the revised camshaft the bigger engine had received in 1965. For North American domestic-market vehicles, the base 170 engine was replaced for 1970 with a stronger new 198 cu in (3.2 L) version of the slant-6. This new base engine was also less costly to make, for unlike the previous 170 engine, the 198 used the same block as the 225. The smaller displacement was achieved with a new crankshaft (3.64 in (92 mm) stroke vs. the 4.125 in (104.8 mm) stroke of the 225 crank) and connecting rods (7.006 in (178.0 mm) long vs. the 6.67 in (169 mm) rods in the 225). Nevertheless, the 225 remained an upgrade option. The 2-barrel 273 cu in (4.5 L) small-block V8 was replaced on the option list in 1968 by a 318 cu in (5.2 L) 2-barrel engine. The 318 was rated at 230 bhp (170 kW) versus the 2-barrel carbureted 273's 180 bhp (130 kW). At the same time the 4-barrel carbureted 273 235 bhp (175 kW) was replaced on the options list by the 275 bhp (205 kW) 4-barrel carbureted 340 cu in (5.6 L) available only in the 1968–1972 Swinger and the hottest Dart, the performance-oriented GTS models. The Dart GTS came standard with the 340 cu in (5.6 L) V8. A 300 hp (220 kW) 383 cu in (6.3 L) big-block was optional.
Source: Wikipedia, 2013