Chevy 350 Engine Specs
Last Updated March 31, 2026The Chevy 350 small block V8 is one of the most iconic and widely used engines in American automotive history. Introduced in 1967 as a performance-oriented version of the small block family, the 350 quickly rose to prominence due to its balance of power, reliability, and adaptability. Over the decades, it became a staple in muscle cars, full-size sedans, trucks, and even marine and industrial applications. Its versatility and massive aftermarket support have made it a go-to engine for enthusiasts and restorers to this day.
| Specification | Detail |
|---|---|
| Displacement | 350 cu in (5.7 L) |
| Bore x Stroke | 4.00 in x 3.48 in (101.6 mm x 88.4 mm) |
| Compression Ratio | 8.0:1 to 11.0:1 (varied by application and year) |
| Valvetrain | OHV, hydraulic or solid lifters |
| Cylinder Heads | Varied: small valve heads to high-performance fuelie heads |
| Carburetion | Rochester Quadrajet, Holley 4-barrel, TBI (later models) |
| Horsepower | 145 hp to over 370 hp depending on configuration |
| Torque | 250 lb-ft to 380 lb-ft |
| Block/Crank | Cast iron block, forged or cast crankshafts |
| Weight | Approx. 575 lb (261 kg) |
Defining Features
The Chevy 350 stood out for its remarkably well-balanced design. With a 4.00-inch bore and 3.48-inch stroke, it offered a smooth and torquey powerband while maintaining reliability across a wide RPM range. The engine's modular construction allowed it to accept a range of performance upgrades, from cylinder heads and cams to intake and ignition systems. Many high-performance versions featured four-bolt main caps, high-flow cylinder heads, aluminum intake manifolds, and aggressive camshaft profiles. While base versions were built for economy and longevity, performance variants like the L46, LT-1, and L82 elevated the 350 to legendary status among enthusiasts.
Applications
The 350 was introduced in the 1967 Camaro as the optional L48 V8, and quickly proliferated across GM's lineup. It became a mainstay in models such as the Chevrolet Chevelle, Nova, Corvette, and Impala throughout the late 1960s and 1970s. The engine also powered countless full-size GM trucks, vans, and SUVs. Its adaptability extended to marine applications and crate engine programs, making it a common choice for everything from boats to custom street rods. Over time, GM continued refining the engine, introducing fuel injection, electronic ignition, and emissions control components to keep it viable through the late 1990s and beyond.
Why It Was Popular
The 350 earned its popularity through a rare combination of affordability, power potential, and dependability. It was compact enough to fit in a wide range of vehicles, yet powerful enough to satisfy performance drivers. Its simple architecture made it easy to work on, and a massive aftermarket ensured that parts and upgrades were readily available. Whether in stock or modified form, the 350 delivered strong performance and longevity, making it one of the most trusted engines in both factory and enthusiast circles. Its reputation for being nearly bulletproof only helped reinforce its widespread use.
Interesting Highlights
Among the most notable versions of the 350 was the 1970 LT-1, which featured solid lifters, high-flow heads, a high-rise aluminum intake, and a Holley carburetor, delivering a factory-rated 370 hp in the Corvette. The L46 and L82 were also high-output variants that appeared in various performance models. In the late 1980s and early 1990s, GM introduced throttle-body and tuned port fuel injection systems on the 350, keeping it competitive during the rise of electronic engine management. Even today, GM offers 350-based crate engines, both in traditional carbureted and modern EFI configurations, continuing the legacy of this legendary powerplant.
Legacy
The Chevrolet 350 small block remains one of the most respected and enduring V8 engines ever made. It became the foundation for countless performance builds and served as the heartbeat of the American muscle car movement for decades. Its influence can be felt in racing, restoration, and hot rodding communities across the globe. Thanks to its straightforward design and unmatched parts availability, the 350 continues to power classic cars, custom builds, and performance machines, securing its place in automotive history as a true icon of American engineering.
