ATK New Chevy 350CI Engine 260HP Complete HP83NEW

Item #22636

Made in the USA
ATK New Chevy 350CI Engine 260HP Complete HP83NEW
ATK HP83NEW New Chevy 350CI Engine 260HP
* ** 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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Built with bolt-on parts the ATK New Chevy 350CI Engine avoids the need for sourcing new parts or cleaning the old parts. Cast iron cylinder heads make this engine highly endurable. This assembled crate engine includes intake manifold, cylinder heads, carburetor, distributor, oil pan, valve covers, timing cover, water pump, harmonic balancer, spark plugs and spark plug wires.

  • Horsepower: 260
  • Torque: 350 lb/ft
  • Block: New OE 4 bolt main 2pc seal 1964-1985
  • Bore/Stroke: 4.000" x 3.480"
  • Displacement: 350ci
  • Crankshaft: New OE 2 piece seal cast crank
  • Balance: Internally
  • Rods: OE powder metal 5.7"
  • Compression Ratio: 8.5:1
  • Pistons: Hypereutectic
  • Rings: Moly
  • Camshaft: Hydraulic flat tappet
  • Cam Duration @ .050": Intake 194 / Exhaust 205
  • Cam Lift: Intake .383" / Exhaust .401"
  • Lobe Separation Angle: 112lsa
  • Timing Chain: Double roller
  • Cylinder Heads: New OE cast iron
  • Combustion Chamber: 76cc
  • Intake Runner: 165cc
  • Valve Size: 1.94" Intake / 1.50" Exhaust
  • Rocker Arms: Stamped steel 1.5
  • Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some Corvettes, and 1962-1967 Chevy II's

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 GM 350 Stock 260 HP Long Block Crate Engines


Engine Information:

• Oil: 10W30
• Oil Filter: Wix or K&N Recommended Per Your Application
• Fuel Delivery: Holley Street Avenger Carburetor 600cfm #0-80457SA
• Intake Manifold: Edelbrock Performer EPS Dual Plane #2701
• Spark Plugs: Champion RV12C
• Spark Plug Gap: .035"
• Harmonic Balancer/Damper: POWERBOND Internally Balanced 8" #PB1046-N
• 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: 1 5/8 Headers
• Fuel Pump: Holley 110GPH Mechanical #12-327-11
• Fuel: 87 Octane
• Ignition: MSD HEI #8362
• Automatic Transmission Stall Converter: Stock

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.

Shipping Instructions

Shipping is free and lift gate will be provided.

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