Account Login
Gift Cards
Track Order
Click image to zoom
ATK Engines HP42

ATK Engines High Performance Crate Engine Big Block Chevy 540ci / 660HP / 650TQ


made in usa
Free Shipping Ships directly from the manufacturer on 11/29/19
Save $10 off $199, $45 off $499, $100 off $999. Promo Code: FALLFUN exclusions apply

ATK Engines High Performance Crate Engine Big Block Chevy 540ci / 660HP / 650TQ $10,300.99
Out of stock
High Performance Crate Engine
  • Big Block Chevy 540ci
  • 660HP / 650TQ
  • Base Engine
  • Items You May Also Consider

    ATK Engines HP42 Details

    Base Engine

    Engine Info

    • Exhaust: 2" Headers
    • Firing Order: 18436572
    • Octane: 91+
    • Oil: 10W30 (Conventional / Non Synthetic) 
    • Oil Filter: Wix or K&N
    • Spark Plug Gap: .035"
    • Stall Converter: 3000+
    • Timing: 34-36 Degrees 

    Recommended Components

    • Balancer: Internal balance 8"
    • Carburetor: Quick Fuel 950cfm mechanical secondary no choke #793-Q-950
    • Distributor: Pro Billet  (iron gear)
    • Flexplate: Internal balance 
    • Fuel Pump: Holley mechanical 130gph #510-12-454-13
    • Intake Manifold: Edelbrock Performer RPM Air Gap dual plane #350-7562
    • Spark Plugs: Autotile #417-3934
    • Spark Plug Wires: 8mm
    • Water Pump: Weiand Action+ aluminum long pump #925-9242


     Disclaimer: The parts listed are ATK's recommendations of parts to be used to obtain the power figures listed. Power figures can vary based on parts used by the end user. Some modifications to the vehicle may be required using these and or other aftermarket parts.

    Engine Break-In Procedure

    Use or break-in oil or conventional (non-synthetic) 10w30 oil with zinc additive for the first 500 miles of operation.  Do not drive for long periods at any single speed, always vary your speed. Do not tow a trailer or put other heavy loads on the vehicle. It is best to avoid long periods of idling during this period. Check the engine oil and coolant levels daily. 

    Engines with flat tappet hydraulic cams only - Run the engine between 2,000 and 2,500 RPM's, with no-load on the engine for the first 30 minutes. Let the engine cool down completely and repeat process 2-3 more times. Do not idle the engine for any extended period at this time, this is critical to break in the camshaft.

    At 500 Miles change the engine oil and filter using conventional (non-synthetic) oil with a zinc additive. Check fuel and ignition settings, adjust valves (where applicable).  Drive the next 500 miles normally, without high RPM's (below 5000 RPM), hard use, or extended periods of high loading or long periods of idling.

    Change the oil and oil filter again at 1,000 miles. Continue using conventional (non-synthetic) oils and zinc additive, until about 4,000 miles. At that point, you may run a quality 10w30 synthetic oil if you choose. Use of oil with zinc or a zinc additive for the life of your engine is recommended. 



    Sold individually
    Manufacturer's Part Number:
    Shipping Weight:
    Package Height:
    Package Depth:
    Package Width:

    In 2007, ATK launched a High Performance Division with one of the finest engine shops in the country. By reverse engineering all of their engines, they are able to eliminate any OEM deficiencies. This makes an ATK built crate engine have a superior design over the original engine by incorporating better components when needed. These quality built engines are offered in three different stages for ease of finishing an engine swap. ATK HP engines feature a 24 month/unlimited mile warranty.

    Engine Specifications

    Designed for street/strip applications, it will have a rough idle, power brakes will not work, and expect big power.

    • Horsepower: 660 hp
    • Torque: 650 lb/ft

    Block Information:

    • Dart Big M 4 bolt main 2 piece rear main seal
    • Bore/Stroke: 4.500" x 4.250"
    • Displacement: 540ci

    Rotating Assembly:

    • Crankshaft: Manley 4340 forged
    • Balance: Internal 
    • Rods: Manley 4340 forged H beam 6.385" with ARP 8740 Bolts
    • Compression Ratio: 10.1:1
    • Pistons: Forged
    • Rings: Moly

    Camshaft Specs:

    • Camshaft: Hydraulic roller
    • Cam Duration @ .050": Intake 243 / Exhaust 249
    • Cam Lift: Intake .640" / Exhaust .640"
    • Lobe Separation Angle: 112lsa
    • Timing Chain: Double roller

    Cylinder Head Information:

    • Cylinder Heads: Dart Pro 1 aluminum
    • Combustion Chamber: 121cc
    • Intake Runner: 320cc
    • Valve Size: 2.250" Intake / 1.880" Exhaust
    • Rocker Arms: Howards Billet aluminum roller rockers 1.7 ratio

    Oil Pan Information:

    • Oil Pan: Moroso street/strip 7qt with windage tray
    • Oil Pump: Melling high volume

     Base Engines

    • Short Block
    • Camshaft
    • Timing Set
    • Cylinder Heads
    • Valve Covers
    • Timing Cover
    • Oil Pan
    • Oil Pump & Pickup Tube
    • Flexplate

    Mid Dress Engines

    • Consists of Base Engine Build
    • Intake Manifold
    • Distributor
    • Water Pump 
    • Harmonic Balancer

    Complete Engines

    • Consists of Mid Dress Engine Build
    • Fuel Pump
    • Carburetor 
    • Spark Plug Wires
    • Spark Plugs

    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.


    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.