Editing Chevrolet big-block engine (section)

===409===
[[File:409Dual4Barrel.jpg|alt=409 Cubic Inch Engine|thumb|409 Cubic Inch Engine. Dual 4 Barrel 409 hp version]]
A {{cvt|409|CID|L|1}} version was Chevrolet's top regular production engine from 1961 to 1965, with a choice of single or 2X4-barrel [[Rochester Products Division|Rochester]] [[carburetor]]s. [[Bore (engine)|Bore]] x [[Stroke (engine)|stroke]] were both up from the {{cvt|348|CID|L|1}} to {{cvt|4.31|x|3.5|in|mm|1}}. On December 17, 1960, the 409 engine was announced along with the [[Chevrolet Impala (third generation)|Impala SS (Super Sport)]] model. The initial version of the engine produced {{cvt|360|hp|kW|0}} with a single 4-barrel [[Carter Carburetor|Carter AFB]] carburetor. The same engine was upped to {{cvt|380|hp|kW|0}} in 1962. A {{cvt|409|hp|kW|0}} version of this engine was also available, developing 1&nbsp;hp per cubic inch with a dual-snorkle [[intake manifold]] and dual aluminum four-barrel Carter AFB carburetors. It had a [[forged steel]] [[crankshaft]].<ref>{{cite web|url=http://auto.howstuffworks.com/chevy-409-cid-v-8-engine1.htm |title=Chevy 409-cid V-8 Engine Overview|website=HowStuffWorks|publisher=Auto.howstuffworks.com |date=2008-04-24 |access-date=2012-05-31|archive-url=https://web.archive.org/web/20120312084059/http://auto.howstuffworks.com/chevy-409-cid-v-8-engine1.htm|archive-date=March 12, 2012}}</ref> This dual-quad version was immortalized in [[the Beach Boys]] song titled "[[409 (song)|409]]".

In the 1963 model year, output reached {{cvt|425|bhp|PS kW|0}} at 6000&nbsp;rpm and {{cvt|425|lbft|Nm|0}} at 4200&nbsp;rpm of [[Machine torque|torque]] with the Rochester 2X4-barrel carburetor setup, a [[compression ratio]] of 11:1 and [[tappet|solid lifters]].<ref>{{cite web|url=http://www.automobile-catalog.com/car/1963/380420/chevrolet_impala_sport_coupe_409_v-8_turbo-fire_425-hp_4-speed_close.html|title=1963 Chevrolet Impala Sport Coupe 409 V-8 Turbo-fire 425-HP 4-speed close|website=automobile-catalog|access-date=July 1, 2018}}</ref> The engine was available through mid-1965, when it was replaced by the {{cvt|396|CID|L|1}} {{cvt|375|hp|kW|0}} Mark IV big-block engine. In addition, a {{cvt|340|hp|kW|0}} version of the 409 engine was available from 1963 to 1965, with a single 4-barrel [[cast iron]] intake mounting a Rochester 4GC square-bore carburetor, and [[hydraulic tappet|hydraulic lifters]].