🔥 ATK High Performance GM 350 345 HP Stage 3 Long Block Crate Engine (HP98C) – Muscle Car Power at Its Best!
💪 Upgrade your classic car, truck, or street rod with the ATK High Performance GM 350 345 HP Stage 3 Long Block Crate Engine!
Give your old ride new life with these ATK High Performance GM 350 345 hp/400 lbs.-ft. Stage 3 long block crate engines. These engines are built to perform and look great without breaking your budget. Each engine is expertly assembled, balanced, blueprinted, and topped with quality components, making it a solid, reliable mill to power your muscle car, street rod, or pickup.
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🔹 What’s Included in the ATK GM 350 Stage 3 Long Block Engine?
✅ Fully Assembled & Dyno Tested 5.7L (350 C.I.D.) V8 Engine
✅ ATK Cast Iron Cylinder Heads (75cc Chamber, 165cc Runner, 1.94/1.50 Valves)
✅ ATK Dual Plane Intake Manifold – Delivers consistent performance across RPM range
✅ Quick Fuel 680 CFM Vacuum Secondary Carburetor – Smooth throttle response & power
✅ Hydraulic Roller Camshaft (.495in/.502ex 110LSA) – Street-friendly powerband
✅ HEI Distributor, Spark Plug Wires & Spark Plugs – Complete ignition system
✅ Holley 110 GPH Mechanical Fuel Pump – Reliable fuel delivery under load
✅ OE Crankshaft & 5.7-inch Powder Metal Connecting Rods – High-strength construction
✅ Hypereutectic Pistons – Lightweight & durable for improved combustion
✅ 5 Qt. Oil Pan & High-Volume Oil Pump with Pickup Tube – Ensures proper lubrication
✅ Valve Covers & Timing Cover – Sealed for long-term reliability
✅ Double Roller Timing Set – Maintains precise valve timing
✅ OE-Style Long Water Pump – Optimized cooling performance
✅ PowerBond 8-inch Harmonic Balancer & 168-Tooth Flexplate – Smooth operation & balance
⚠️ Excludes air cleaner, flywheel, and computer system.
🔹 Technical Specifications
| Feature | Details |
|---|---|
| Brand | ATK High Performance Engines |
| Manufacturer’s Part # | HP98C |
| Product Type | High-Performance Long Block Crate Engine |
| Summit Racing Part # | HPE-HP98C |
| Crate Engine Family | Chevy Small Block |
| Actual Displacement | 5.7L / 350 C.I.D. |
| Horsepower | 345 HP |
| Torque | 400 lb-ft |
| Compression Ratio | 9.1:1 |
| Assembled? | ✅ Yes |
| Camshaft Type | Hydraulic Roller |
| Cylinder Heads Included? | ✅ Yes (Cast Iron, 75cc Chambers) |
| Fuel System | ✅ Carbureted (Includes Quick Fuel 680 CFM Carburetor) |
| Distributor Included? | ✅ Yes (HEI Distributor) |
| Valve Covers Included? | ✅ Yes |
| Timing Cover Included? | ✅ Yes |
| Oil Pan Included? | ✅ Yes |
| Harmonic Balancer Included? | ✅ Yes |
| Water Pump Included? | ✅ Yes (Long Style) |
| Flexplate Included? | ❌ No |
| 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 |
| Remanufactured? | ✅ Yes |
| Quantity | Sold Individually |
💪 A perfect balance of performance, reliability, and affordability!
🔹 Fitment & Compatibility
✔ Ideal for street cars, muscle cars, and hot rods
✔ Compatible with Chevy Small Block 350 engine mounts & accessories
✔ Works with both automatic and manual transmissions
💡 Ensure compatibility with your vehicle before purchasing.
🔹 Installation Notes & Recommendations
🔧 Professional Installation Recommended – Proper break-in procedure is required
⚙️ Pre-Tuned for Optimal Performance – Minimal adjustments needed after install
🔩 Dyno-Tested & Quality Checked – Guaranteed power & reliability
⚠️ Some additional components may be required for full installation.
❓ Frequently Asked Questions (FAQ)
🔹 Is this engine a direct replacement for a stock Chevy 350?
- Yes, it fits most vehicles using a 5.7L (350 C.I.D.) Small Block Chevy engine.
🔹 What type of fuel system does this engine require?
- It includes a Quick Fuel 680 CFM carburetor and a dual-plane intake manifold.
🔹 Does this engine require a computer?
- No, it is a standalone carbureted engine with no computer or EFI required.
🔹 What fuel octane is recommended?
- Premium 91+ octane is recommended for best performance.
🔥 Order Your ATK High Performance GM 350 345 HP Stage 3 Long Block Crate Engine Today!
🏁 Give your ride the power it deserves with this fully assembled, dyno-tested 5.7L small block engine!
✔ 345 HP & 400 lb-ft of Torque – Perfect for street builds
✔ Fully Balanced, Blueprinted & Assembled for Maximum Performance
✔ Includes Carburetor, Distributor, Fuel Pump, & More!
🛒 ORDER NOW & EXPERIENCE TRUE SMALL BLOCK POWER! 🏆💨
ATK GM 350 345 hp Stage 3 long block crate engines include:
* Handpicked, OE remanufactured block
* ATK cast iron 75cc/165cc 1.94/1.50 heads
* ATK dual plane intake manifold
* Quick Fuel 680 cfm vacuum secondary carburetor
* OE crankshaft
* OE 5.7 in. powder metal connecting rods
* Hypereutectic pistons
* Hydraulic roller camshaft .495in/.502ex 110LSA
* HEI Distributor, plug wires and plugs
* Holley 110 GPH mechanical fuel pump
* Valve covers
* Timing cover and double roller timing set
* 5 qt. oil pan, high volume oil pump with pickup tube
* OE style long water pump
* PowerBond 8 in. balancer and 168 tooth flexplate
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