Editing Chrysler LA engine (section)

==273 V8<span class="anchor" id="273"></span>==
The {{cvt|273|CID|L|1}} was the first LA engine, beginning model year 1964 and offered through 1969, rated at {{cvt|180|hp|0}}. It had a bore and stroke of {{cvt|3.625x3.31|in}}. It had {{citation needed span|text=a mechanical solid lifter valvetrain until 1968 when hydraulic lifters were introduced;|reason=This boldface claim needs the support of a reliable citation, and clarification of the performance implications of a solid lifter valvetrain.|date=April 2024}} hydraulic lifters generally make for a quieter valvetrain. The reciprocating assembly included a cast or forged steel crankshaft, drop forged steel connecting rods and cast aluminum pistons. The valvetrain consisted of a cast nodular iron camshaft, solid or hydraulic lifters, solid pushrods, and shaft-mounted, malleable iron rocker arms (stamped steel on later hydraulic-cam engines). These actuated the overhead steel intake and exhaust valves. The cylinder heads featured wedge-shaped combustion chambers with a single intake and a single exhaust valve for each cylinder. Spark plugs were located in the side of the cylinder head, between the exhaust ports.<ref name="Willem Weertman" />

A high-performance {{cvt|235|hp|0}} was offered from 1965 to 1967; called the "Commando", it was standard in the [[Plymouth Barracuda#1965|Barracuda Formula S]] model and optional in all other compact models excluding station wagons. It featured a 4-barrel carburetor and matching intake manifold, chrome unsilenced air cleaner with callout sticker, longer-duration and higher-lift camshaft and stronger valve springs, 10.5:1 compression ratio, and special black wrinkle valve covers with extruded aluminum appliqués. It was fitted to a low-restriction exhaust system with a {{cvt|2.5|in}} exhaust pipe, collector-type Y-junction, and exposed resonator. For 1965 (only), the muffler was of "straight through" construction.

A special version, exclusive to the 1966 [[Dodge Dart]], was available. It used a {{cvt|0.5|in|1}} lift solid-lifter camshaft, fabricated-steel-tube exhaust, and a Holley 4-barrel carburetor, producing {{cvt|275|hp|0}} (1&nbsp;hp/cu&nbsp;in). The car so equipped was called the "D-Dart," a reference to its classification in NHRA D-stock for drag racing, which was the car's only intended purpose.

{{hidden begin|title=Applications:|titlestyle=background:#88FF88; text-align:left;|bodystyle=text-align:left;}}
* 1964–1969 [[Dodge Dart]]
* 1964–1969 [[Plymouth Barracuda]]
* [[Plymouth Belvedere]]
* [[Dodge Coronet]]
* [[Plymouth Satellite]]
* 1964–1969 [[Plymouth Valiant]]
* 1966–1967 [[Ghia 450 SS]]
{{hidden end}}