ATK Chrysler 360 Magnum Engine 290HP Complete EFI HP73C-EFI

Item #22622

Made in the USA
ATK Chrysler 360 Magnum Engine 290HP Complete EFI HP73C-EFI
HP73C-EFI ATK Chrysler 360 Magnum Complete Engine Long Block
* ** THIS ITEM IS TEMPORARILY OUT OF STOCK *** FREE SHIPPING on ATK Engines. This item ships directly from the manufacturer and is not available for store pickup. Some engines are made-to-order or can be backordered. Delivery can be delayed up to 5 to 6 weeks but typically ship within 2 weeks.
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Enjoy ideal driving experience regardless of the condition by installing the ATK HP73C-EFI Chrysler 360 Magnum Engine 290HP Complete EFI. It uses FITECH'S NEW Self Learning EFI systems that regulate the engine performance without any manual tuning for cold starts, elevation or change in parts. This crate engine adds 320 horsepower and more than 420 torque to your ride.

Engine Specifications:

  • Horsepower: 320
  • Torque: 420+ lbs./ft.
  • Block: Seasoned OE Magnum
  • Bore/Stroke: 4.040 x 3.580
  • Displacement: 360 C.I.D.
  • Crankshaft: OE Cast 3.580" Externally Balanced
  • Connecting Rods: OE Steel Rod 6.123" Stock Bolts
  • Pistons: Hypereutectic Dished
  • Piston Rings: Moly Rings
  • Compression Ratio: 10.1:1 Compression
  • Camshaft: Hydraulic Roller
  • Camshaft Specifications: Stock Magnum Grind
  • Camshaft Bearings: Installed & Clocked to OEM Position
  • Cylinder Heads: Magnum 65cc 1.78/1.50
  • Freeze Plugs: Brass Installed & Sealed
  • Rocker Arms: Steel 1.6 Pedestal
  • 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.

Don't forget the engine paint!
Engine Paint


ATK High Performance Chrysler 360 Magnum 320 HP Stage 3 Long Block Crate Engines with EFI


Engine Information:

• Oil: 10W30
• Oil Filter: Wix or K&N Recommended Per Your Application
• Fuel Delivery: Fitech Go Street EFI 400HP (throttle body, wire harness and hand held tuner)
• Intake Manifold: Edelbrock Performer RPM Air-Gap Dual Plane #7577
• Spark Plugs: Autolite #3923
• Spark Plug Gap: .035"
• Harmonic Balancer/Damper: POWERBOND Externally Balanced #PB1186-N
• Flex Plate / Flywheel: Pioneer Flex Plate #FRA-478 (requires Ext. Balance Converter)
• Timing: 34-36 Degrees Total
• Water Pump: Stock
• Firing Order: 1 8 4 3 6 5 7 2
• Exhuast: 1 5/8 Headers
• Fuel Pump: Not provided. Customer must run electric fuel pump setup or Fitech fuel command center
• Fuel: 87 Octane
• Ignition: Pro Billet RTR (must run ignition control box)
• Automatic Transmission Stall Converter: Stock (If using a Neutral Balance Converter, you need to use a B&M Flex Plate #10242 (externally balanced)

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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