ATK HP73C Chrysler 360 Magnum Complete Engine 320HP



Lead Time: Estimated: 4 - 6 weeks


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  • $370 Core charge - $370.00


Engine Specifications:
• HP: 320
• TQ: 410
• Block: OE Magnum roller block 1993-2001
• Bore/Stroke: up to 4.060” x 3.580”
• Displacement: 360CI
• Crankshaft: OE Cast
• Rods: OE 6.123”
• Pistons: Hypereutectic 9:1 compression
• Rings: Moly
• Camshaft: Hyd. roller
• Cam Specs: OE Magnum grind
• Timing Chain: Double roller
• Cylinder Heads: OE Magnum cast iron 65cc 1.78/1.50
• Rocker Arms: Steel 1.6 Pedestal Rockers
• Oil Pan: OE front sump 5qt
• Oil Pump: Melling STD volume
• Flexplate/Flywheel: Internally balanced – Pioneer #FRA-478 (requires Ext. balanced converter)
• Balancer: Externally balanced
• Intake Manifold: Edelbrock performer RPM air gap dual plane #7577
• Distributor: Pro billet RTR (Iron Gear)
• Water Pump: OE early pump
• Carburetor: Quick Fuel 680CFM vacuum secondary’s electric choke #HR-680
• Fuel Pump: Holley mechanical 110GPH #12-360-11
• Spark Plugs: Autolite #3923
• Spark Plug Wires: 8mm

Engine Info:
• Oil: Conventional / Non synthetic 10W30
• Oil Filter: Wix or K&N
• Timing: 34-36 Degrees
• Spark Plug Gap: .035”
• Firing Order: 18436572
• Octane: 89+
• Stall Converter: Stock
• Exhaust: 1 5/8 Headers

Notes: If using a neutral balance converter, you need to use an externally balanced magnum 360 flex plate. Valve covers are now the Edelbrock version of this same valve cover (Black Finned).


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 in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. . ATK reserves the right to substitute parts used in engines if necessary.


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