Description
About This Engine
The Chevy 350 small block is the most produced American V8 engine in history. Introduced in 1967 by boring the 327 to 4.00 inches, the 350 went on to be used in more GM vehicles across more model years than any other engine. From the 1967 Camaro to the 2002 Chevy Express van- 35 years, dozens of applications, and tens of millions of units- the 350 small block is the universal American V8.
Three major evolutionary steps define the 350 for buyers today. In 1987, GM introduced hydraulic roller lifters across the SBC lineup- a significant durability improvement that eliminated flat-tappet cam wear. In 1992, the LT1 reversed the cooling system flow for better performance. In 1996, the Vortec 350 (L31) introduced aluminum cylinder heads with redesigned combustion chambers- these heads are significantly better flowing than any earlier cast iron SBC head and are widely used for performance upgrades on earlier 350 blocks.
For C/K truck, Suburban, Tahoe, Camaro, Corvette, Caprice, and countless other GM vehicle owners, a tested documented 350 small block is the most available and best-supported used American V8 on the market.
Signs You Need a Replacement Engine
- Blue smoke on startup that clears after a few minutes- valve stem seal deterioration, extremely common on aged SBC engines
- Knock or tick at idle that changes with oil pressure- lifter failure or cam lobe wear on flat-tappet engines
- Loss of compression on one or more cylinders- ring wear, scored walls, or head gasket failure
- Overheating on the LT1 specifically- reverse-cooling water pump failure is a known LT1 issue
- Oil consumption beyond 1 quart per 1,000 miles- ring or valve guide failure
- Knock under load- rod or main bearing wear on high-mileage units
Known Problems With This Engine
- Flat-tappet cam wear on pre-1987 engines: Engines produced before 1987 use flat-tappet camshafts requiring ZDDP zinc additive in the oil. Many were run for years without it, accelerating cam lobe wear. We inspect valvetrain indicators on every pre-1987 unit.
- LT1 water pump: The 1992 to 1997 LT1 uses a reverse-flow cooling system with a cam-driven water pump. The pump is driven by the camshaft rather than a belt. Failed LT1 water pumps are the leading cause of LT1 overheating and subsequent head gasket failure. We flag this for LT1 units before shipping.
- Vortec head bolt pattern change: The 1996-and-newer Vortec 350 (L31) uses a different intake manifold bolt pattern than earlier 350 heads. A Vortec intake is required for a Vortec engine. We document head type before shipping.
- Two-bolt vs four-bolt mains: Standard 350 blocks use 2-bolt main caps. High-performance variants (LT1, L82, some Z28 units) use 4-bolt. We confirm main cap configuration before every order ships.
- Center bolt vs perimeter valve covers: 1987-and-newer SBC engines use center-bolt valve covers. Pre-1987 engines use perimeter bolt valve covers. Accessories and covers are not interchangeable across this divide.
Key Chevy 350 Variants- Fuel System and Application
The 350 was produced in numerous configurations. Key variants buyers encounter:
| Variant | Years | HP Range | Compression | Notes |
|---|---|---|---|---|
| L48 4V Carb | 1967 to 1980 | 255 to 370 hp | 8.0 to 11.0:1 | Standard and high-performance carbureted versions. Flat-tappet cam. Most common early SBC. |
| L82 4V Carb | 1973 to 1981 | 200 to 250 hp (net) | 8.5:1 | High-output Corvette variant. 4-bolt mains. Flat-tappet cam. |
| L98 TPI | 1985 to 1992 | 230 to 245 hp | 9.0:1 | Tuned Port Injection. Camaro and Corvette. Roller cam from 1987. Performance icon of the era. |
| TBI 350 | 1987 to 1995 | 145 to 210 hp | 8.5:1 | Throttle Body Injection. C/K trucks, Suburban, Tahoe. Roller cam. Most available used units. |
| LT1 | 1992 to 1997 | 260 to 330 hp | 10.5:1 | Reverse-flow cooling. Cam-driven water pump. Corvette, Camaro, Caprice. 4-bolt mains. |
| Vortec L31 | 1996 to 2002 | 255 hp | 9.4:1 | Sequential EFI. Aluminum Vortec heads- different intake bolt pattern. Trucks and vans. |
Common Casting Numbers- Reference
| 3970010 / 3970014 | Most common 1969 to 1979 blocks- the most widely available SBC casting |
|---|---|
| 14010207 / 14093638 | 1980s era blocks- roller cam provisions from 1987 |
| 10243880 (Vortec) | 1996 to 2002 Vortec L31 block- pairs with aluminum Vortec heads |
We document the casting number and date code of every unit. Available on request before you place your order.
What Is Included- What Is Not Included
| INCLUDED- Long Block | Block, crankshaft, pistons, connecting rods, camshaft, cylinder heads, valve train, oil pan, front timing cover, and water pump where present. |
|---|---|
| NOT INCLUDED | Intake manifold, carburetor or EFI system, exhaust manifolds, distributor or coil pack, alternator, power steering pump, starter, flywheel or flexplate, accessory brackets. |
| Short Block Option | Call (240) 301-0095 if you need a short block only. |
| Core Note | No core charge. You are not required to return your old engine. |
Vehicle Compatibility- Direct Fit
The Chevy 350 was factory installed in an enormous range of GM vehicles including:
| Chevrolet Camaro | 1967 to 2002 (multiple variants including LT1 and LS1 not covered here) |
|---|---|
| Chevrolet Corvette | 1969 to 1991 (L48, L82, L98 variants) |
| Chevrolet C/K Truck and Suburban | 1969 to 2000 |
| Chevrolet Tahoe and Blazer | 1992 to 2000 |
| Chevrolet Caprice and Impala SS | 1969 to 1996 (LT1 in 1994 to 1996 Impala SS) |
| GMC C/K Truck and Suburban | 1969 to 2000 |
| Pontiac Firebird and Trans Am | 1977 to 1992 (selected years) |
| Buick and Oldsmobile full-size | Various 1977 to 1990 applications |
The SBC is the most swap-compatible American V8 ever produced. It fits any vehicle that originally used any small block Chevy engine (262, 265, 267, 283, 305, 307, 327) using the same mounts and bellhousing. The 350 also swaps into thousands of custom and kit car applications due to its widespread aftermarket support.
Transmission compatibility: Turbo-Hydramatic 350 (TH350)- most common light-duty pairing | Turbo-Hydramatic 400 (TH400)- heavy-duty | 700R4 / 4L60- overdrive automatic from 1982 | Muncie 4-speed- classic performance | T56 6-speed- LT1 and late Camaro applications.
Not sure if this fits? Call (240) 301-0095 with your year, make, model, and current drivetrain. We verify fitment before every order ships.
Common Names and Search Terms
| Chevy 350 | Most common buyer search |
|---|---|
| 350 small block | SBC designation |
| SBC 350 | Abbreviation used by enthusiasts |
| Chevy 350 motor | Motor vs engine buyer |
| 5.7L Chevy engine | Liter-format truck buyer |
| 350 TBI engine | Throttle body injection era buyer |
| Vortec 350 | Late 1990s truck buyer |
| LT1 350 engine | Performance variant buyer |
| L98 350 engine | TPI Corvette and Camaro buyer |
| 350 crate engine | Builder buyer |
Used OEM vs Rebuilt vs Aftermarket- Which Is Right for You?
Used OEM is the right choice for a C/K truck, Suburban, Tahoe, or Caprice that needs a reliable verified replacement. Our 350s are compression tested with variant, cam type, and fuel system documented so you know exactly what you are installing.
A remanufactured unit makes sense if you want fresh tolerances with a warranty from a rebuilder. Crate 350s from GM Performance and aftermarket suppliers are widely available for performance builds. Call us to discuss options.
Condition and Inspection Process
- Compression test across all 8 cylinders- pressure per cylinder recorded
- Cam type confirmed- flat-tappet (pre-1987) or roller (1987 onward) documented
- Fuel system type confirmed- carb, TBI, TPI, or Vortec EFI noted before shipping
- Head type confirmed- standard cast iron, LT1, or Vortec aluminum documented
- Main cap configuration confirmed- 2-bolt or 4-bolt documented
- LT1 water pump condition noted specifically on LT1 units
- Valve cover style confirmed- center bolt or perimeter bolt noted
Mileage varies by unit. Where available from the donor vehicle we provide it. Where mileage cannot be confirmed, we disclose this before your order is placed.
Buyer Tips- What to Know Before You Order
- Flat-tappet oil additive: Pre-1987 350 engines use flat-tappet camshafts. Always add a ZDDP zinc supplement. Modern low-zinc oils accelerate cam lobe wear on flat-tappet engines.
- Vortec intake requirement: The 1996-and-newer Vortec 350 (L31) uses a different intake manifold bolt pattern. A Vortec-specific intake is required. A standard SBC intake will not fit.
- LT1 water pump: The LT1 uses a cam-driven reverse-flow water pump- not a belt-driven pump. Replacement requires the LT1-specific pump. A standard SBC water pump will not work on an LT1.
- Center bolt vs perimeter valve covers: 1987-and-newer SBC uses center-bolt valve covers. Pre-1987 uses perimeter bolt. Accessories, valve covers, and some breather setups are not interchangeable across this line.
- Roller cam retrofit: It is possible to convert a pre-1987 flat-tappet 350 block to a roller cam using a retrofit kit. However, not all pre-1987 blocks have the correct provisions. Tell us if you are planning this conversion and we will note block compatibility.
Why Buy From Vaz Auto Solutions
- Variant documented before you pay- carb, TBI, TPI, Vortec, or LT1 confirmed
- Cam type confirmed- flat-tappet or roller documented before shipping
- Head type documented- standard, LT1, or Vortec aluminum noted
- Compression tested across all 8 cylinders- results shared before order confirmed
- Fitment verified for your specific GM vehicle
- No core charge- keep your old engine
- Free freight pallet delivery to all 50 states, no hidden fees
- 15 day replacement warranty on internal engine defects
- Call (240) 301-0095- speak with someone who understands 35 years of Chevy 350 variants
Frank Morales (verified owner) –
Found a decent 350 on Vaz Auto Solutions. Good compression, strong runner. Needed some cleaning, but it’s a solid heart for my project truck. Can’t beat the price for this reliable workhorse.
Jim Hawkins (verified owner) –
Bought a used 350 from Vaz Auto Solutions. Classic Chevy power, still runs like a champ. Bit of an oil leak, but that’s expected. Great value for a bulletproof engine.
Jeff W., Columbus OH –
Bought an LT1 350 for my Z28. Vaz specifically flagged the cam-driven water pump and told me to replace it at installation — which saved me from a future overheating situation. Compression was solid across all 8. One minor oil seep at the rear main — disclosed before shipping. Car is back on the road.
Mike T., Dallas TX –
Needed a TBI 350 for my Silverado. Vaz confirmed the roller cam 1990s block and TBI fuel system before I paid. Compression came back 148 to 156 across all 8 — consistent and strong. Truck started on first crank after install. Best experience I have had buying a used engine online.