Chevrolet 454 Big Block Engine

CLASSIC ENGINE · MODEL DETAIL

Chevrolet 454 Big Block

7.4L V8 · LS6 · LS5 · The Ultimate Muscle Era Big Block — Used, Rebuilt & Crate Sourcing

About the Chevrolet 454

The Chevrolet 454 big block — 454 cubic inches, 7.4 litres — is the flagship displacement of Chevrolet’s Mark IV Big Block V8 family. Introduced in 1970, the 454 was offered in legendary high-performance guises including the LS6 (originally rated at 450 horsepower) and LS5 variants, making it one of the most powerful production V8 engines of the muscle car era.

Beyond muscle cars, the 454 big block had a long working life in GM trucks, vans, and motorhomes through the early 1990s. This extended production history means a substantial supply of used cores and rebuilt engines remains available in the Canadian market, making the 454 one of the more accessible classic big blocks for sourcing internationally.

Canada Parts Exports can source 454 cores, rebuilt assemblies, and complete engines. For numbers-matching restorations, casting number verification and date code documentation are strongly recommended — Canada Parts Exports does not verify originality claims without documented supplier evidence.

Sourcing Options

454 BIG BLOCK · USED CORE

Used 454 Engine Core

7.4L V8 · Mark IV Big Block · Various Years

Used 454 cores range from high-mileage truck engines to lower-mileage car cores. Truck-application cores are more common and typically more affordable. Car cores — especially pre-1972 — carry a significant premium. Specify application type and intended use so sourcing can prioritize appropriate core grade.

✓ Availability by Request

Request Quote
454 BIG BLOCK · REBUILT

Rebuilt 454 Long Block

7.4L V8 · Rebuilt to Standard Specification · Includes Heads

Rebuilt 454 long block assemblies are sourced from Canadian engine rebuilders. A standard rebuild includes new rings, bearings, gaskets, and timing components with machine work to OEM or specified tolerances. Rebuild specification, compression ratio, and camshaft profile vary by supplier — these details are confirmed in the sourcing quote.

✓ Availability by Request

Request Quote
454 BIG BLOCK · CRATE

454 Crate Engine (New)

7.4L V8 · New Production · Performance Specification Available

New 454 crate engines are available through GM Performance Parts and aftermarket suppliers in multiple performance configurations. These are new-production engines not intended for OEM restoration matching but suitable for restomod, street performance, and marine builds. Canada Parts Exports can source and export — confirm horsepower target and application.

✓ Availability by Request

Request Quote

Key Specifications — Chevrolet 454 Big Block

DISPLACEMENT

454 cu in / 7.4L

CONFIGURATION

V8, 90°

BORE × STROKE

4.251″ × 4.00″

PRODUCTION YEARS

1970–1995 (automotive/truck)

BLOCK FAMILY

Mark IV Big Block (Gen V truck variant post-1991)

NOTABLE VARIANTS

LS6, LS5, LS4, L29 (truck)

Restoration Note: Casting numbers and date codes are strongly recommended for concours or numbers-matching builds. Canada Parts Exports does not verify originality claims without documented evidence from the supplier. High-value original LS6 cores require independent authentication.

Source a Chevrolet 454

Canada Parts Exports sources 454 big block cores, rebuilt engines, and crate units through Canadian suppliers. Submit an inquiry with your application details for confirmed sourcing options.