Buy ATK High Performance GM 350 390 Online
Transform your ride with the legendary reliability and raw power of the ATK High Performance GM 350 390 HP. Engineered for enthusiasts who demand street-shredding torque and seamless installation, this 350ci motor is the ultimate upgrade for your project. Order today to experience dyno-proven performance delivered to your door.
If you are searching for a Chevy engine 350 for sale that balances classic muscle with modern precision, the ATK 390 HP series is built for you. This isn’t just another rebuilt motor; it is a meticulously engineered ATK 350 crate engine designed to solve the headache of underpowered, high-maintenance stock blocks.
Built using high-quality components and held to exacting tolerances, this 350ci motor provides a significant power jump without sacrificing street driveability. Whether you are restoring a classic C10 or upgrading a Camaro, this engine delivers the “thump” you want at idle and the acceleration you need on the open road. By choosing an ATK build from Electrical Marine Solutions, you bypass the risks of local machine shops and receive a balanced, blueprinted power plant ready for action.
While many look for a 6.2 LS engine or a 6.2 engine for modern swaps, the classic GM 350 remains the gold standard for ease of installation and timeless performance. This engine gives you that massive 390 HP output in a package that fits right where your old small block lived.
Overview
ATK High Performance GM 350 390 HP Stage 1 Long Block Crate Engines
Awesome performance and awesome looks combine with these ATK High Performance GM 350 390 hp Stage 1 long block crate engines. They are topped with trick-looking parts, and they have the power to back them up. These engines are hand-assembled and balanced to help them put out 390 hp and 420 ft.-lbs. of torque that will tear up the street or strip. Whether you are looking to pack some more power in your street rod, muscle car, or truck, ATK has you covered.
ATK GM 350 390 hp Stage 1 long block crate engines include:
- Handpicked, remanufactured block
- ATK High Performance aluminum cylinder heads with 2.020 in. /1.600 ex. valves
- OE crankshaft and connecting rods
- Hypereutectic pistons
- Hydraulic roller camshaft
- Valve covers
- Timing cover and timing set
- Oil pan, pump, and pickup tube
Product Specifications
- Displacement: 350 Cubic Inches (5.7L)
- Horsepower: 390 HP
- Torque: 410 ft-lbs
- Block: 4-Bolt Main GM Crate Block
- Compression Ratio: 9.5:1 (Pump Gas Friendly)
- Crankshaft: Nodular Iron
- Cylinder Heads: Performance Aluminum 190cc
- Camshaft Type: Hydraulic Roller
Benefits / Why Choose This Product
The ATK High Performance GM 350 390 offers a “best-of-both-worlds” scenario. Unlike a standard 6.o ls engine or 6.2LS33 crate engine, which may require expensive wiring harnesses and computer tuning, the ATK 350 offers a mechanical simplicity that saves you time and money.
- Reliability: Every engine is backed by a rigorous quality control process.
- Value: Get near-LS levels of power with the affordable maintenance of a Small Block Chevy.
- Versatility: Perfect for muscle cars, street rods, and high-performance marine applications.
FAQs Section
Does this engine come with a warranty?
Yes, all ATK engines sold through Electrical Marine Solutions come with a limited factory warranty covering parts and labor.
What fuel should I use for this 390 HP build?
This engine is designed to run efficiently on 91 or 93-octane pump gas thanks to its 9.5:1 compression ratio.
Is shipping included for such a heavy item?
We offer competitive freight shipping rates across the region. Please enter your zip code at checkout for an instant quote.
Conversion Elements
- Trust Signal: Includes a 24-Month/Unlimited Mile Warranty.
- Urgency: High demand for the 390 HP series—current lead times may increase. Secure your build today!
- Secure Checkout: SSL-encrypted payments for your peace of mind.

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