Editing AMC straight-6 engine (section)

===258===
[[File:1974 AMC Gremlin X red with white stripes AMO 2015 meet 8of8.jpg|thumb|258 engine in a 1974 [[AMC Gremlin]]]]
[[File:1980 AMC AMX engine bay 258 I6 CZ.jpg|thumb|Engine bay of a 1980 [[AMC Spirit]] AMX with 258 and emissions controls]]

The {{cvt|258|CID|L|1}} was produced from 1971 through 1990. It featured an [[undersquare]] {{cvt|3.75|in|mm|1}} bore and {{cvt|3.895|in|mm}} stroke; it was otherwise similar to the 199 and 232 (Note: Starting in the mid-1970s the 258's bore and stroke was changed to a {{cvt|3.82|in|mm}} bore over a 3.75" stroke. This allowed one block to be used for both the 232 and 258 and the same crankshaft blank could be milled to the two different strokes).

This engine is considered reliable, inexpensive, and torquey.<ref name="offroaders">{{cite web |url= http://www.offroaders.com/tech/jeep/engine-factory-amc258i6.htm |title=AMC 258 I6 |website=offroaders.com |access-date=17 April 2024}}</ref> Later 258 models (starting with the 1980 model year for [[California]] AMC Concords and Spirits, 1981 for California Jeeps, California [[AMC Eagle|Eagles]], and 49-state Concord and Spirits, as well as in 1982 for 49-state Eagles and all other applications) are equipped with [[AMC Computerized Engine Control]] (CEC) system. For 1981, as part of a weight reduction program (aluminum intake manifold, plastic rocker arm cover), the crankshaft was changed from a twelve counterweight design to four, saving approximately {{convert|20|lb|kg|1}}.

This engine also found use in farm/industrial applications such as the International Harvester 4000 [[swather]].

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*[[AMC Hornet]]/[[AMC Concord|Concord]]/[[AMC Eagle|Eagle]] (1971–1988)
*[[AMC Pacer]] (1975–1980)
*[[AMC Matador]] (1971–1978)
*[[AMC Gremlin]] and [[AMC Spirit|Spirit]] (1971–1983)
*[[International Scout]] and [[International Light Line pickup|Light Line trucks]] (1972–1980)
*[[Jeep CJ]] (1972–1986)
*[[Jeep Cherokee (SJ)|Jeep Cherokee]] and [[Jeep Wagoneer|Wagoneer]] (1972–1986)
*[[Jeep J-Series]] (1971–1988)
*[[Jeep Wrangler]] (1987–1990)
*[[Jeep Commando]] (1972–1973)
*VAM Rambler American (1973–1974) U.S. equivalent — AMC Hornet sedans
*VAM Rambler American Rally (1973–1974) U.S. equivalent — AMC Hornet X sedan instead of a hatchback
*VAM Camioneta Rambler American (1973–1974) U.S. equivalent — AMC Hornet Sportabout
*VAM American (1975–1983) U.S. equivalent — AMC Hornet sedan base model and AMC Concord sedan base model
*VAM American Rally (1975) U.S. equivalent — AMC Hornet X sedan instead of a hatchback
*VAM Camioneta American (1975–1983) U.S. equivalent — AMC Hornet Sportabout and Concord base model wagon
*VAM American ECD (1975–1979) U.S. equivalent — AMC Hornet DL two and four-door sedans and AMC Concord DL/Limited four-door sedan
*VAM Gremlin X (1976–1982) U.S. equivalent — AMC Gremlin X and AMC Spirit sedan X model equivalent
*VAM Gremlin (1977–1983) U.S. equivalent — AMC Gremlin and AMC Spirit sedan base model
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