Engine Summary
- Manufacturer
- Chevrolet
- Family
- Mark IV big-block
- Displacement
- 454 cubic inches
Also Known As
454 LS6LS6 454Chevrolet 454ci LS6Chevy LS6 454RPO LS6LS6/450hpTurbo-Jet 454El Camino SS 454 LS61970 El Camino LS6
Engine profile
Chevrolet 454ci LS6 V8
Mark IV big-block · 454 cubic inches · Chevrolet
Identification reference
Engine Details
Source-backed component numbers, codes, stampings, and application notes.
Engine block casting number
- Value
- 3963512
- Application
- 1970 Chevelle LS6 454-cid 450-hp application
- Type
- block / casting number
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Sources: 1970 LS6 Engine Codes and Specifications , Big Block Chevy Engine Block Casting Numbers by Year
Duration
- Value
- 316 degrees intake; 316 degrees exhaust
- Application
- 1970 Chevelle LS6 454-cid 450-hp mechanical-lifter camshaft specification
- Type
- camshaft / specification
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Mechanical-lifter camshaft casting number
- Value
- 3904366
- Application
- 1970 Chevelle LS6 454-cid 450-hp application; same camshaft also reported for 402/375-hp engine
- Type
- camshaft / casting number
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Mechanical-lifter camshaft part number
- Value
- 3904362
- Application
- 1970 Chevelle LS6 454-cid 450-hp application; same camshaft also reported for 402/375-hp engine
- Type
- camshaft / part number
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Valve lift
- Value
- 0.520 in intake and exhaust
- Application
- 1970 Chevelle LS6 454-cid 450-hp mechanical-lifter camshaft specification
- Type
- camshaft / specification
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
GM carburetor part number for special high-performance automatic application
- Value
- 3969898-GR
- Application
- 1970 special high-performance 396/454 with automatic transmission except E.E.C.
- Type
- carburetor / part number
- Car pages
- 1970 Chevrolet Chevelle SS 454 LS6
GM carburetor part number for special high-performance non-automatic application
- Value
- 3967477-GG
- Application
- 1970 special high-performance 396/454 except automatic transmission and E.E.C.
- Type
- carburetor / part number
- Car pages
- 1970 Chevrolet Chevelle SS 454 LS6
Holley List 4491 / GM 3967479-GM
- Value
- List 4491; GM 3967479-GM
- Application
- 1970 special high-performance 396/454 manual transmission with E.E.C.; LS6 Registry lists as 454 California E.E.C. M/T
- Type
- carburetor / carburetor list
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Sources: 1970 LS6 Engine Codes and Specifications , Holley Carburetor List Numbers
Holley List 4492 / GM 3969898-GR
- Value
- List 4492; GM 3969898-GR
- Application
- 1970 special high-performance 396/454 automatic transmission without E.E.C.; LS6 Registry lists as 454 federal without E.E.C. A/T
- Type
- carburetor / carburetor list
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Sources: 1970 LS6 Engine Codes and Specifications , Holley Carburetor List Numbers
Holley List 4556 / GM 3969894-GP
- Value
- List 4556; GM 3969894-GP
- Application
- 1970 special high-performance 396/454 automatic transmission with E.E.C.; LS6 Registry lists as 454 California E.E.C. A/T
- Type
- carburetor / carburetor list
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Sources: 1970 LS6 Engine Codes and Specifications , Holley Carburetor List Numbers
Holley List 4557 / GM 3967477-GG
- Value
- List 4557; GM 3967477-GG
- Application
- 1970 special high-performance 396/454 manual transmission without E.E.C.; LS6 Registry lists as 454 federal without E.E.C. M/T
- Type
- carburetor / carburetor list
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Sources: 1970 LS6 Engine Codes and Specifications , Holley Carburetor List Numbers
Holley list number for special high-performance automatic application
- Value
- 4492
- Application
- 1970 special high-performance 396/454 with automatic transmission except E.E.C.
- Type
- carburetor / carburetor list
- Car pages
- 1970 Chevrolet Chevelle SS 454 LS6
Holley list number for special high-performance non-automatic application
- Value
- 4557
- Application
- 1970 special high-performance 396/454 except automatic transmission and E.E.C.
- Type
- carburetor / carburetor list
- Car pages
- 1970 Chevrolet Chevelle SS 454 LS6
Cast-iron cylinder head casting number
- Value
- 3964291
- Application
- 1970 Chevelle LS6 454-cid 450-hp closed-chamber square-port cast-iron head application
- Type
- cylinder head / casting number
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Combustion chamber volume
- Value
- 109.037 cc
- Application
- 1970 Chevelle LS6 454-cid 450-hp cylinder-head specification
- Type
- cylinder head / specification
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Distributor stamped number
- Value
- 1111437
- Application
- 1970 Chevelle LS6 454-cid 450-hp application
- Type
- distributor / stamp
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Bore
- Value
- 4.21 in
- Application
- 1970 Chevelle LS6 454-cid 450-hp engine specification
- Type
- engine assembly / specification
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Compression ratio
- Value
- 11.25:1
- Application
- 1970 Chevelle LS6 454-cid 450-hp engine specification
- Type
- engine assembly / specification
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
CRR
- Value
- 1970 454-4 450-hp LS6 with TH-400
- Application
- 1970 Chevelle A-body LS6 automatic-transmission application; El Camino use still requires car-specific paperwork/inspection
- Type
- engine assembly / assembly code
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
CRR engine suffix code
- Value
- CRR
- Application
- 1970 Chevelle 454-cid, 450-hp engine with TH400 automatic transmission
- Type
- engine assembly / assembly code
- Location
- engine assembly stamp pad suffix
- Car pages
- 1970 Chevrolet Chevelle SS 454 LS6
CRV
- Value
- 1970 454-4 450-hp LS6 with manual M22
- Application
- 1970 Chevelle A-body LS6 M22 manual-transmission application; El Camino use still requires car-specific paperwork/inspection
- Type
- engine assembly / assembly code
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
CRV engine suffix code
- Value
- CRV
- Application
- 1970 Chevelle 454-cid, 450-hp engine with manual transmission
- Type
- engine assembly / assembly code
- Location
- engine assembly stamp pad suffix
- Car pages
- 1970 Chevrolet Chevelle SS 454 LS6
Stroke
- Value
- 4.00 in
- Application
- 1970 Chevelle LS6 454-cid 450-hp engine specification
- Type
- engine assembly / specification
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Left-hand exhaust manifold casting number
- Value
- 3909879
- Application
- 1970 Chevelle LS6 454-cid 450-hp application
- Type
- exhaust manifold / casting number
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Right-hand exhaust manifold casting number
- Value
- 3916178
- Application
- 1970 Chevelle LS6 454-cid 450-hp application
- Type
- exhaust manifold / casting number
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Aluminum low-rise intake manifold casting number
- Value
- 3963569
- Application
- 1970 Chevelle LS6 454-cid 450-hp application
- Type
- intake manifold / casting number
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Exhaust valve size
- Value
- 1.88 in
- Application
- 1970 Chevelle LS6 454-cid 450-hp cylinder-head specification
- Type
- valve train / specification
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Intake valve size
- Value
- 2.19 in
- Application
- 1970 Chevelle LS6 454-cid 450-hp cylinder-head specification
- Type
- valve train / specification
- Car pages
- 1970 Chevrolet El Camino SS 454 LS6
Cars Using This Engine
2 linked car pages.
Malibu two-door sport coupe or convertible
1970 Chevrolet Chevelle SS 454 LS6
Factory Chevrolet SS454 package, documented as RPO Z15 in registry evidence
Two-door coupe utility / pickup-style A-body with integrated cargo bed
1970 Chevrolet El Camino SS 454 LS6
Factory Chevrolet El Camino SS454 pathway with LS6 evidence handled through paperwork-first checks