340 block casting number
- Value
- 2780930 followed by 340
- Application
- 1971-1972 Dodge Dart Demon 340 / 340 LA small-block reference
- Type
- block / casting number
- Location
- Driver side of block, just below the deck
Sources: 1971-72 Dodge Dart Demon 340 Buyer’s Guide
Cylinder block material
- Value
- Cast iron
- Application
- 1970 Plymouth Barracuda/Cuda 340 CID engine
- Type
- block / specification
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
340 automatic-transmission camshaft
- Value
- 268° intake, 276° exhaust, 44° overlap, 0.430/0.445-inch lift
- Application
- 1968 Dart GTS 340 with TorqueFlite automatic
- Type
- camshaft / specification
Sources: 1968 Dodge Dart fact sheet
340 manual-transmission camshaft
- Value
- 276° intake, 284° exhaust, 52° overlap, 0.445/0.455-inch lift
- Application
- 1968 Dart GTS 340 with four-speed manual
- Type
- camshaft / specification
Sources: 1968 Dodge Dart fact sheet
383 camshaft
- Value
- 256° intake, 260° exhaust, 32° overlap, 0.425/0.437-inch lift
- Application
- 1968 Dart GTS optional 383 four-barrel
- Type
- camshaft / specification
Sources: 1968 Dodge Dart fact sheet
Camshaft timing and lift
- Value
- Intake 268 degrees; exhaust 276 degrees; overlap 44 degrees; intake lift 0.430 inch; exhaust lift 0.445 inch
- Application
- 1968 Barracuda 340 CID four-barrel V-8 with automatic transmission
- Type
- camshaft / specification
Sources: Overdrive Fact Sheet
Camshaft timing and lift
- Value
- Intake 276 degrees; exhaust 284 degrees; overlap 52 degrees; intake lift 0.445 inch; exhaust lift 0.455 inch
- Application
- 1968 Barracuda 340 CID four-barrel V-8 with manual transmission
- Type
- camshaft / specification
Sources: Overdrive Fact Sheet
Camshaft type
- Value
- Hydraulic camshaft
- Application
- 340 four-barrel engine family as described for 1971-1972 Demon 340 buyer guidance
- Type
- camshaft / specification
Sources: 1971-72 Dodge Dart Demon 340 Buyer’s Guide
Transmission-specific 340 camshaft
- Value
- Manual-transmission 340 used more lift and duration than the automatic version
- Application
- 1968 340 GTS
- Type
- camshaft / specification
Sources: September 1968 Dodge Dart GTS road test
Carburetion type
- Value
- four-barrel carburetor
- Application
- 1969 Plymouth Barracuda with 340 four-barrel V8 / Cuda 340 context
- Type
- carburetor / specification
Sources: 1969 Plymouth Barracuda Fact Sheet , 1969 Plymouth Barracuda specifications
Carburetor barrels and throttle-bore sizes
- Value
- 1 four-barrel; primary 1.44 in, secondary 1.69 in
- Application
- 1970 340 CID Carter AVS applications
- Type
- carburetor / specification
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Carburetor type
- Value
- Carter Thermo-Quad four-barrel carburetor
- Application
- 1972 Demon 340 four-barrel fuel system
- Type
- carburetor / specification
Sources: 1971-72 Dodge Dart Demon 340 Buyer’s Guide , The Dodge Demon 340 brought power to the people
Carter 4972S carburetor assembly
- Value
- 4972S
- Application
- 1971 340 application shown in Chrysler parts-catalog carburetor assembly table; transmission-specific use should be verified against the original build record for an individual car.
- Type
- carburetor / carburetor list
Catalog row appears in the 1971 model carburetor assembly table adjacent to 340 engine entries.
Sources: 1970-71 Passenger Car Parts Catalog - Fuel Pages
Carter 4973S carburetor assembly
- Value
- 4973S
- Application
- 1971 340 application shown in Chrysler parts-catalog carburetor assembly table; transmission-specific use should be verified against the original build record for an individual car.
- Type
- carburetor / carburetor list
Catalog row appears in the 1971 model carburetor assembly table adjacent to 340 engine entries.
Sources: 1970-71 Passenger Car Parts Catalog - Fuel Pages
Carter AVS carburetor list number
- Value
- AVS-4935S
- Application
- 1970 340 CID engine, automatic transmission with air conditioning, except California
- Type
- carburetor / carburetor list
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Carter AVS carburetor list number
- Value
- AVS-4937S
- Application
- 1970 340 CID engine, automatic transmission without air conditioning, California only
- Type
- carburetor / carburetor list
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Carter AVS carburetor list number
- Value
- AVS-4934S
- Application
- 1970 340 CID engine, automatic transmission without air conditioning, except California
- Type
- carburetor / carburetor list
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Carter AVS carburetor list number
- Value
- AVS-4936S
- Application
- 1970 340 CID engine, manual transmission, California only
- Type
- carburetor / carburetor list
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Carter AVS carburetor list number
- Value
- AVS-4933S
- Application
- 1970 340 CID engine, manual transmission, except California
- Type
- carburetor / carburetor list
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Carter AVS four-barrel
- Value
- Single four-barrel with air-valve secondaries
- Application
- period-tested 340 configuration
- Type
- carburetor / specification
Sources: September 1968 Dodge Dart GTS road test
Carter AVS four-barrel applications
- Value
- 340 manual: 4424S; 340 automatic: 4425S; 383 manual: 4426S; 383 automatic: 4401S
- Application
- 1968 Dart GTS 340 and 383 factory engine paths
- Type
- carburetor / part number
Sources: 1968 Dodge Dart fact sheet
Carter AVS four-barrel carburetor list number
- Value
- 4425S
- Application
- 1968 Barracuda 340 CID four-barrel V-8 with automatic transmission
- Type
- carburetor / carburetor list
Sources: Overdrive Fact Sheet
Carter AVS four-barrel carburetor list number
- Value
- 4424S
- Application
- 1968 Barracuda 340 CID four-barrel V-8 with manual transmission
- Type
- carburetor / carburetor list
Sources: Overdrive Fact Sheet
Carter four-bore down-draft climatic-control carburetor original carburetor number
- Value
- 6318S-SA
- Application
- 1973 Dodge Dart 340 and listed Plymouth/Chrysler 340 applications; non-California row
- Type
- carburetor / carburetor list
Sources: 1973 Chrysler 340 Carter carburetor specifications and adjustment data, Form 5587A
Carter four-bore down-draft climatic-control carburetor original carburetor number
- Value
- 6319S-SA
- Application
- 1973 Dodge Dart 340 and listed Plymouth/Chrysler 340 applications; non-California row
- Type
- carburetor / carburetor list
Sources: 1973 Chrysler 340 Carter carburetor specifications and adjustment data, Form 5587A
Carter four-bore down-draft climatic-control carburetor original carburetor number
- Value
- 6339S-SA
- Application
- 1973 Dodge Dart 340 and listed Plymouth/Chrysler 340 California applications
- Type
- carburetor / carburetor list
Sources: 1973 Chrysler 340 Carter carburetor specifications and adjustment data, Form 5587A
Carter four-bore down-draft climatic-control carburetor original carburetor number
- Value
- 6340S-SA
- Application
- 1973 Dodge Dart 340 and listed Plymouth/Chrysler 340 California applications
- Type
- carburetor / carburetor list
Sources: 1973 Chrysler 340 Carter carburetor specifications and adjustment data, Form 5587A
Four-barrel carburetion
- Value
- Carter ThermoQuad context in the reviewed surviving-car reference
- Application
- 1972 340 four-barrel; verify exact carburetor number and date on the individual engine
- Type
- carburetor / specification
Sources: 1972 Plymouth Duster, Valiant, and Barracuda sales brochure , Survivor 1972 Plymouth Duster 340
Connecting rod center-to-center length
- Value
- 6.123 in
- Application
- 1970 Plymouth Barracuda/Cuda 340 CID engine
- Type
- connecting rod / specification
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Connecting rod material
- Value
- Drop-forged steel
- Application
- 1970 Plymouth Barracuda/Cuda 340 CID engine
- Type
- connecting rod / specification
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Connecting rods
- Value
- Forged-steel connecting rods
- Application
- 1972 Demon 340 LA-series small-block V8
- Type
- connecting rod / specification
Sources: The Dodge Demon 340 brought power to the people
Cast-crankshaft changeover engine serial number
- Value
- HM340R-3911-8000
- Application
- 340 engines built from April 11, 1972 changeover cited from Chrysler TSB by Hemmings
- Type
- crankshaft / stamp
Hemmings reports that a cast crankshaft replaced the forged crankshaft beginning April 11, 1972 at this 340 engine serial number.
Sources: 1971-72 Dodge Dart Demon 340 Buyer’s Guide
Forged-to-cast crankshaft production change
- Value
- Cast crankshaft assembly 3751162 replaced the forged crank on April 11, 1972 at engine serial HM340R-3911-8000; identify it by sharp counterweight corners and raised CFD letters on the number-four counterweight
- Application
- All 1972 340 CID engines at and after the factory cutoff; the cast and forged assemblies are not directly interchangeable because the cast system requires matched external-balance parts
- Type
- crankshaft / part number
- Location
- Engine serial and number-four crankshaft counterweight
Sources: Technical Service Bulletin 09-07A-72C: Cast Crankshaft
Cylinder head material
- Value
- Cast iron
- Application
- 1970 Plymouth Barracuda/Cuda 340 CID engine
- Type
- cylinder head / specification
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Valve sizes
- Value
- 1.88-inch intake valves and 1.60-inch exhaust valves
- Application
- 1972 340 four-barrel
- Type
- cylinder head / specification
Sources: 1971-72 Dodge Dart Demon 340 Buyer’s Guide
Distributor part number
- Value
- 3438225
- Application
- 1970 340 CID engine, automatic transmission
- Type
- distributor / part number
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Distributor part number
- Value
- 3438255
- Application
- 1970 340 CID engine, manual transmission
- Type
- distributor / part number
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
1972 Duster 340 output
- Value
- 240 SAE net hp at 4,800 rpm and 290 lb-ft at 3,600 rpm
- Application
- Standard engine in the 1972 Plymouth Duster 340
- Type
- engine assembly / specification
Sources: 1971 AMC Hornet SC/360 or 1972 Plymouth Duster 340 , 1972 Plymouth Duster, Valiant, and Barracuda sales brochure , Survivor 1972 Plymouth Duster 340
383 packaging restrictions
- Value
- Power steering and air conditioning not available
- Application
- 1968 Dart GTS with 383
- Type
- engine assembly / specification
Sources: 1968 Dodge Performance Models brochure , 1968 Dodge Salesman's Pocket Guide: Dart factory-installed options
Advertised net horsepower
- Value
- 240 hp
- Application
- 1972 340 four-barrel
- Type
- engine assembly / specification
Sources: 1971-72 Dodge Dart Demon 340 Buyer’s Guide
Bore and stroke
- Value
- 4.04 x 3.31 inches
- Application
- 1968 Barracuda 340 CID four-barrel V-8, manual and automatic transmission applications
- Type
- engine assembly / specification
Sources: Overdrive Fact Sheet
Bore and stroke
- Value
- 4.04 x 3.31 in
- Application
- 1970 Plymouth Barracuda/Cuda 340 CID engine
- Type
- engine assembly / specification
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Bore and stroke
- Value
- 4.04 x 3.31 inches
- Application
- 1972 Demon 340 LA-series small-block V8
- Type
- engine assembly / specification
Sources: The Dodge Demon 340 brought power to the people
Compression and exhaust
- Value
- 8.5:1 compression, single-snorkel intake, and dual exhaust
- Application
- 1972 Duster 340 factory specification
- Type
- engine assembly / specification
Sources: 1971-72 Plymouth Duster 340 buyer's guide , 1972 Plymouth dealership data book: Valiant and Duster , 1972 Plymouth Duster, Valiant, and Barracuda sales brochure
Compression ratio
- Value
- 10.5:1
- Application
- 1968 Barracuda 340 CID four-barrel V-8, manual and automatic transmission applications
- Type
- engine assembly / specification
Sources: Overdrive Fact Sheet
Compression ratio
- Value
- 10.5:1
- Application
- 1969 Plymouth Barracuda with 340 four-barrel V8 / Cuda 340 context
- Type
- engine assembly / specification
Sources: 1969 Plymouth Barracuda Fact Sheet , 1969 Plymouth Barracuda specifications
Compression ratio
- Value
- 10.5:1
- Application
- 1970 Plymouth Barracuda/Cuda 340 CID engine
- Type
- engine assembly / specification
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Compression ratio
- Value
- 8.5:1
- Application
- 1972 340 four-barrel
- Type
- engine assembly / specification
Sources: 1971-72 Dodge Dart Demon 340 Buyer’s Guide , The Dodge Demon 340 brought power to the people
Factory gross horsepower rating
- Value
- 275 hp
- Application
- 1969 Plymouth Barracuda with 340 four-barrel V8 / Cuda 340 context
- Type
- engine assembly / specification
Sources: 1969 Plymouth Barracuda Fact Sheet , 1969 Plymouth Barracuda specifications
Factory gross torque rating
- Value
- 340 lb-ft
- Application
- 1969 Plymouth Barracuda with 340 four-barrel V8 / Cuda 340 context
- Type
- engine assembly / specification
Sources: 1969 Plymouth Barracuda Fact Sheet , 1969 Plymouth Barracuda specifications
Gross horsepower rating
- Value
- 275 hp @ 5000 rpm
- Application
- 1968 Barracuda 340 CID four-barrel V-8, manual and automatic transmission applications
- Type
- engine assembly / specification
Sources: Overdrive Fact Sheet , Overdrive Hipo Roadtest
Gross torque rating
- Value
- 340 lb-ft @ 3200 rpm
- Application
- 1968 Barracuda 340 CID four-barrel V-8, manual and automatic transmission applications
- Type
- engine assembly / specification
Sources: Overdrive Fact Sheet , Overdrive Hipo Roadtest
Optional 383 four-barrel
- Value
- 300 gross hp at 4,400 rpm; 400 lb-ft at 2,400 rpm; 10.0:1 compression; 4.25 x 3.38-inch bore and stroke
- Application
- optional on 1968 Dart GTS only; factory order code 62
- Type
- engine assembly / specification
Sources: 1968 Dodge Dealership Data Book: 340 and 383 engines , 1968 Dodge Performance Models brochure , 1968 Dodge Salesman's Pocket Guide: Dart factory-installed options
Published maximum brake horsepower
- Value
- 275 bhp @ 5000 rpm
- Application
- 1970 Plymouth Barracuda/Cuda 340 CID engine
- Type
- engine assembly / specification
AMA value corrected to 60 F and 29.92 in Hg atmospheric pressure.
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Published maximum torque
- Value
- 340 lb-ft @ 3200 rpm
- Application
- 1970 Plymouth Barracuda/Cuda 340 CID engine
- Type
- engine assembly / specification
AMA value corrected to 60 F and 29.92 in Hg atmospheric pressure.
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Standard 340 four-barrel
- Value
- 275 gross hp at 5,000 rpm; 340 lb-ft at 3,200 rpm; 10.5:1 compression; 4.04 x 3.31-inch bore and stroke
- Application
- standard on 1968 Dart GTS hardtop and convertible
- Type
- engine assembly / specification
Sources: 1968 Dodge Dealership Data Book: 340 and 383 engines , 1968 Dodge Performance Models brochure
Cast-crank vibration damper
- Value
- Damper 3751160, marked Use with 340 Cast Crank Only on its front or reverse side
- Application
- Matched external-balance damper for the cast-crank 1972 340 system
- Type
- harmonic balancer / part number
- Location
- Front or reverse face of the vibration damper
Sources: Technical Service Bulletin 09-07A-72C: Cast Crankshaft
Electronic ignition
- Value
- Chrysler electronic ignition system
- Application
- Standard on the 1972 Duster 340
- Type
- ignition / specification
Sources: 1972 Plymouth dealership data book: Valiant and Duster , 1972 Plymouth Duster, Valiant, and Barracuda sales brochure
Intake manifold
- Value
- Cast-iron intake manifold
- Application
- 1972 Demon 340 four-barrel fuel system
- Type
- intake manifold / specification
Sources: The Dodge Demon 340 brought power to the people
Cast-crank matched balance parts
- Value
- Torque converter 3681641, manual-transmission flywheel 3681639, and short engine 3751163
- Application
- Matched parts for the cast-crank 1972 340 system; the converter uses large balance weights and the flywheel uses a balance hole
- Type
- other / part number
Sources: Technical Service Bulletin 09-07A-72C: Cast Crankshaft
Piston material
- Value
- Aluminum alloy
- Application
- 1970 Plymouth Barracuda/Cuda 340 CID engine
- Type
- piston / specification
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Piston weight
- Value
- 25.4 oz
- Application
- 1970 Plymouth Barracuda/Cuda 340 CID engine
- Type
- piston / specification
Sources: 1970 Plymouth Barracuda / Gran Coupe / Cuda AMA specifications
Pistons
- Value
- Cast-aluminum pistons
- Application
- 1972 Demon 340 LA-series small-block V8
- Type
- piston / specification
Sources: The Dodge Demon 340 brought power to the people
Rocker-arm ratio
- Value
- 1.50:1 shaft-mounted rocker arms
- Application
- 340 four-barrel engine family as described for 1971-1972 Demon 340 buyer guidance
- Type
- valve train / specification
Sources: 1971-72 Dodge Dart Demon 340 Buyer’s Guide
Valve lifter type
- Value
- Hydraulic
- Application
- 1968 Barracuda 340 CID four-barrel V-8, manual and automatic transmission applications
- Type
- valve train / specification
Sources: Overdrive Fact Sheet
