The ATK HP98M Chevy 350CI Engine 345HP Mid Dress is a pocket-friendly solution for building your own muscle machine. Delivering massive horsepower and a cool exterior as a complement, it is made with top-quality parts that are hand assembled and balanced by experts. It also produces enough vacuum to work with power accessories like power brakes and others.
- Horsepower: 345
- Torque: 400 lbs./ft.
- Block: Seasoned OE 4 Bolt Main 1pc Seal Roller Block P/S Dipstick
- Bore/Stroke: 4.040 x 3.480
- Displacement: 350 C.I.D.
- Crankshaft: OE Cast Crank 3.480" Stroke Externally Balanced Rear/Internal Front 1pc.
- Connecting Rods: OE Powder Metal 5.700" Stock Bolts
- Pistons: Hypereutectic
- Piston Rings: Moly Rings
- Compression Ratio: 9.1:1 Compression
- Camshaft: Hydraulic Roller
- Camshaft Specifications: 220/224 @050 .495in/.502ex 110LSA
- Camshaft Bearings: Installed & Clocked to OEM Position
- Cylinder Heads: Dart Cast Iron 75cc/165cc 1.94/1.50
- Freeze Plugs: Brass Installed & Sealed
- Rocker Arms: Stamped Steel 1.5 Ratio
- Oil Galley Plugs: Installed & Sealed
- Oil Pan: OE 5qt.
- Weight: 430
ATK specializes in muscle. With the highest quality internal parts and Dyno Proven combinations of every engine built, ATK is able to add the most bang for your buck and back it up with an industry leading warranty.
ATK High Performance GM 350 345 HP Stage 3 Long Block Crate Engines
• Oil: 10W30
• Oil Filter: Wix or K&N Recommended Per Your Application
• Fuel Delivery: Quick Fuel Carburetor 680cfm #HR-680-VS
• Intake Manifold: Weiand Stealth Dual Plane #8150
• Spark Plugs: Champion RV12C
• Spark Plug Gap: .035"
• Harmonic Balancer/Damper: POWERBOND Internally Balanced 8" #PB1046-N
• Flex Plate / Flywheel: Externally Balanced 168 Tooth
• Timing: 34-36 Degrees Total
• Water Pump: Long Water Pump
• Firing Order: 1 8 4 3 6 5 7 2
• Exhuast: 1 5/8 Headers
• Fuel Pump: Holley 110GPH Mechanical #12-327-11
• Fuel: 91+ Octane
• Ignition: HEI
• Automatic Transmission Stall Converter: 2200-2500
Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. It is the customer’s responsibility to verify components will work for their application. Some modifications to the vehicle may be required using these and or other aftermarket parts.
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