ATK GM 350 Vortec 350 HP HP32C Stage 3 Complete LB
Drop this heavy duty Vortec-headed ATK GM 350 350HP crate engine straight into your custom engine bay. Tough cast iron construction combines with a 9.5:1 compression squeeze. Plug in the distributor. Burn rubber.
- Complete carburetor package speeds up installation
- 9.5:1 compression delivers reliable torque
- Vortec cylinder heads provide unmatched street throttle response
- One piece rear seal keeps garage floors clean
Description
Modernizing classic chassis performance requires the ATK GM 350 Vortec 350 HP HP32C Stage 3 Complete LB and its fully assembled carbureted induction system. Experience crisp throttle response and massive mid-range acceleration. This build utilizes legendary iron Vortec cylinder heads to generate three hundred fifty horsepower instantly.
Key Features of ATK GM 350 Vortec 350 HP HP32C
- Block Material: Cast iron Chevy Small Block resists thermal fatigue and provides a stable foundation for the internally balanced rotating assembly.
- Cylinder Heads: High-performance cast iron Vortec heads manage intense combustion temperatures effectively while maximizing volumetric efficiency.
- Compression Ratio: A 9.5:1 advertised compression ratio optimizes power output while remaining completely safe for premium pump gas.
- Induction System: A pre-installed carburetor and matched intake manifold provide an accelerated path for immediate turn-key performance.
- Ignition System: The included HEI distributor delivers consistent high-voltage spark to prevent misfires under heavy load.
- Camshaft Style: A modern hydraulic roller camshaft minimizes internal valvetrain friction while delivering an aggressive street idle.
- Water Pump Style: The included long-style water pump simplifies accessory drive installation for classic Chevrolet chassis.
Component Breakdown: Turn-Key Complete Stage 3 Engine
This complete engine package arrives fully dressed from the intake manifold to the oil pan to eliminate sourcing individual modern accessories.
- A high flow carburetor sits atop a matched intake manifold while the included distributor and spark plug wires ensure immediate ignition out of the crate.
- A long style water pump and harmonic balancer complete the front drive assembly allowing builders to focus on chassis installation.
Vehicle Fitment & Compatibility Matrix
Designed for classic Chevrolet restomod projects this complete engine drops perfectly into vintage chassis. Sourcing one of our premium Vortec crate engines modernizes your classic restoration instantly.
- Fits 1967-1981 Chevrolet Camaro models looking for an instant turn-key powertrain swap.
- Fits 1973-1987 Chevrolet C10 pickup trucks requiring a reliable and powerful carbureted setup.
- Fits 1964-1972 Chevrolet Chevelle applications needing a reliable V8 foundation.
- Fits 1968-1974 Chevrolet Nova conversions requiring a 350 drop-in setup.
Fuel & Ignition System Requirements (Tech Notes)
Supplying adequate fuel pressure to this fully dressed small block platform requires capable supporting hardware.
- The pre-installed carburetor requires a high pressure mechanical or electronic fuel pump while utilizing 91 Octane premium pump gas prevents pre-ignition under load.
- The pre-installed distributor and spark plug wires mandate a clean twelve volt power source directly from the battery to guarantee a powerful spark.
Installation, Break-In Oil & Priming Instructions (Tech Notes)
Executing a flawless installation demands meticulous attention to fluid dynamics and proper heat cycling.
- Before firing the engine builders must utilize a specialized tool to prime the oiling system manually ensuring fluid reaches the upper valvetrain completely.
- Fill the engine with a premium high zinc break in oil and perform a careful initial startup monitoring for leaks before executing a 500 mile break in period.
USA Warranty, Emissions & Logistics
Protecting your investment requires understanding the specific logistics and legal compliance associated with this purchase.
- Backed by a strict 1-Year manufacturer warranty this complete long block offers extensive coverage against assembly defects when documented installation procedures are followed.
- This non-emissions compliant engine is designated for pre-emissions or off road Race Use Only and requires freight delivery to a commercial address with a forklift.
ATK High Performance HP32C GM 350 Vortec 350 HP Stage 3 Long Block Specs
| Brand | ATK High Performance Engines |
| Part Type | Crate Engines |
| Product Line | ATK High Performance GM 350 Vortec 350 HP Stage 3 Long Block Crate Engines |
| UPC | 00653517259975 |
| Crate Engine Family | Chevy Small Block |
| Actual Engine Displacement | 5.7L / 350 CI |
| Crate Engine Cylinder Head Material | Cast iron |
| Engine Block Material | Cast iron |
| Advertised Compression Ratio | 9.5:1 |
| Assembled | Yes |
| Engine Balance | Internal/External |
| Cam Style | Hydraulic roller, OE roller |
| Rear Main Seal Style | 1-piece |
| Intake Manifold Included | Yes |
| Intake Manifold Style | Carbureted |
| Cylinder Heads Included | Yes |
| Carburetor Included | Yes |
| Throttle Body Included | No |
| Distributor Included | Yes |
| Oil Pan Included | Yes |
| Valve Covers Included | Yes |
| Timing Cover Included | Yes |
| Water Pump Included | Yes |
| Water Pump Style | Long |
| Harmonic Balancer Included | Yes |
| Flexplate Included | Yes |
| Flywheel Included | No |
| Air Cleaner Included | No |
| Spark Plugs Included | Yes |
| Spark Plug Wires Included | Yes |
| Computer Included | No |
| Wiring Harness Included | No |
| Supercharger Included | No |
| Warranty Info | 1 Year |












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