http://www.ehow.com/list_7614804_mopar-383-specs.html1959
The Mopar 383 made its debut in 1959 as a raised engine. This engine had a bore of 4.03 inches and a stroke of 3.75 inches. It had 345 horsepower at 5000 revolutions per minute and a two four-barrel induction system.
1960
The 383 engines offered in 1960 included three different models: The long ram and short ram, terms referring to the engines' internal divider wall, and low-deck 383. The long ram was used in passenger cars and the short ram was an optional engine that could only be purchased outside of the car. The long ram was rated for 330 horsepower at 4800 RPM with a torque rating of 460 foot-pounds at 2800 RPM. The short ram had 340 horsepower at 5000 RPM and 440 foot-pounds of torque at 2800 RPM. The low-deck version of the 383 had a bore of 4.25 inches and a stroke of 3.38 inches. Low-deck engines with 300J heads had 343 horsepower and was used in larger model cars.
1961 and 1962
The 383 long ram and short ram engines were offered in 1961 vehicles. Although the low-deck option debuted notably in 1960, it was available for purchase outside of the car through 1962.
1966
The 383 was offered in both a two and four-barrel option. Both engines had a bore of 4.25 inches and a stroke of 3.375 inches. The two-barrel came with a compression ratio of 9.2 to one. It had a horsepower rating of 270 at 4400 RPM and a torque rating of 390 foot-pounds at 2800 RPM. The four-barrel had a compression ratio of 10.0 to one. It had a horsepower rating of 325 at 4800 RPM and a torque rating of 425 foot-pounds at 2800.
1968
Three 383 engines were offered in 1968 with the same bore and stroke from previous years. The first was a two barrel engine with 290 horsepower at 4400 RPM and 390 foot-pounds of torque at 2800 RPM. This engine had a compression ratio of 9.2 to one. The other two engines were four-barrels with 10.0 to one compression ratios. The first one had 300 horsepower at 44000 RPM and 400 foot-pounds of torque at 2400 RPM. The other four-barrel had 330 horsepower at 5000 RPM and 425 foot-pounds of torque at 3200 RPM.
1969
The two-barrel 383 engine from 1968, along with the 330 horsepower four-barrel engine, were offered in 1969. The 300 horsepower engine was discontinued and an engine with 335 horsepower at 5000 RPM was introduced. This engine also had the 10.0 to one compression ratio, 4.25 inch bore and 3.375 inch stroke. This engine had 425 foot-pounds of torque at 3400 RPM.
1970
In 1970, the compression ratios of the 383 engines were lowered. The two-barrel engine came with a compression ratio of 8.7 to one. This engine had 290 horsepower at 4400 RPM and 390 foot-pounds of torque at 3200 RPM like in previous years. The four-barrel engines came with a compression ratio of 9.5 to one. The 330 horsepower engine maintained the same horsepower and torque specs from 1969. The most powerful 383 came with 335 horsepower like the previous year but at 5200 RPM rather than 5000. The torque rating was maintained.
1971
The compression ratios for the 383 engines was once again dropped in 1971. Only one two-barrel and one four-barrel engine were offered and both of these engines had a compression ratio of 8.5 to one. The two-barrel had 275 horsepower at 4400 RPM and 375 foot-pounds of torque at 2800 RPM. The four-barrel had 300 horsepower at 4800 RPM and 410 foot-pounds of torque at 3400 RPM.
