gross for the 4 barrel. In 1970, Chrysler offered a special Six-Pack version of the 340 with triple 2-barrel carburetors rated at gross that was specific to Challenger TA and Cuda AAR models. This version featured a heavy duty short block with additional webbing to allow for aftermarket installed 4 bolt main bearing caps. The application-specific cylinder heads featured relocated intake pushrod passages with offset rocker arms that allowed the pushrods to be moved away from the intake ports, which could improve airflow if the pushrod-clearance "hump" was ground away from the intake port by the end user. An aluminum intake manifold mounted three Holley carburetors, and a dual points ignition system was fitted. The combination of rising gasoline prices and insurance company crackdown on high-performance vehicles saw the relatively expensive 340 detuned and phased out. It remained a high performance engine through 1971, but was de-tuned in 1972 with the introduction of low compression (8.5:1) small valve heads, and by mid-year, a cast nodular iron crankshaft, and a variety of other emissions related changes. For the 1974 model year it was replaced by the engine. Chrysler Valiant Charger (Australia) Dodge Challenger Dodge Charger Dodge Dart 1971–1972 Dodge Demon Dodge Super Bee Plymouth Barracuda Plymouth Duster Plymouth Road Runner Plymouth Sport Fury GT Monica 560 Hongqi CA770 215 HP 360 V8 The LA has a bore and stroke of . It was released in 1971 with a two barrel carburetor. The 360 used the large intake port 340 heads with a smaller intake valve of . In 1974, with the introduction of the code E58 4-BBl dual exhaust version, at SAE net, became the most powerful LA engine with the end of 340 production. Power started dropping from 1975 on as more emission controls were added resulting with the 1980 E58 engine only producing SAE net. Starting with 1981, the 360 was exclusively used in Dodge trucks and vans. The 1978-1979 Li'l Red Express truck used a special high-performance 360 4-barrel engine with factory production code EH1 that was rated at 225 SAE Net HP in production form The EH1 was a modified version of the E58 360 police engine (E58) producing net at 3800 rpm due in part, that as it was installed in a "truck", and not a car, it did not have to use catalytic converters (1978 only) which allowed for a free-flowing exhaust system. Some prototypes