From tracks to the streets, the ATK HP631PM Chevy 496 Stroker Engine 600HP Mid Dress delivers unparallel performance no matter where. It promises a rough idle, more than 600 horsepower and above 605 ft.lb torque for improved overall performance. This crate engine is perfect for those who want to build a muscle with their own components.
- Horsepower: 600+
- Torque: 605+ lbs./ft.
- Block: Seasoned OE 4 Bolt Main 1pc Seal Gen V 1991-1995
- Bore/Stroke: 4.310 x 4.250
- Displacement: 496 C.I.D.
- Crankshaft: Scat 4340 Forged 4.250" Stroke Internally Balanced 1pc.
- Connecting Rods: Scat 4340 Forged H Beam 6.385" ARP 8740 Bolts
- Pistons: Forged
- Piston Rings: Moly Rings
- Compression Ratio: 10.1:1 Compression
- Camshaft: Hydraulic Roller
- Camshaft Specifications: Custom Grind
- Camshaft Bearings: Installed & Clocked to OEM Position
- Cylinder Heads: Edelbrock Aluminum 118cc/315cc 2.19/1.88
- Freeze Plugs: Brass Installed & Sealed
- Rocker Arms: Howards Billet Aluminum Full Roller 1.7 Ratio
- Oil Galley Plugs: Installed & Sealed
- Oil Pan: Moroso 6qt.
- Weight: 510
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 496 Stroker 600+ HP Stage 2 Long Block Crate Engines
• Oil: 10W30
• Oil Filter: Wix or K&N Recommended Per Your Application
• Fuel Delivery: Quick Fuel Race Carburetor 850cfm #Q-850
• Intake Manifold: Edelbrock Performer RPM Air-Gap Dual Plane #7562
• Spark Plugs: Autolite #3923
• Spark Plug Gap: .035"
• Harmonic Balancer/Damper: POWERBOND SFI Internally Balanced 8" #PB1211-SS
• Flex Plate / Flywheel: Internally Balanced 168 Tooth
• Timing: 34-36 Degrees Total
• Water Pump: Long Water Pump
• Firing Order: 1 8 4 3 6 5 7 2
• Exhuast: 2 1/8 Headers
• Fuel Pump: No Mechanical Fuel Pump Provision, Must Use Electric
• Fuel: 91+ Octane
• Ignition: MSD Pro Billet #85551
• Automatic Transmission Stall Converter: 3500+
• Carburetor: Quick Fuel 850cfm mechanical secondary no choke #793-Q-850
• Fuel Pump: No mechanical fuel pump provision, must run an electric pump
• Spark Plugs: Autotile #417-3923
• Spark Plug Wires: 8mm
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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