Complete Engine
ATK Core Return Process
JEGS and ATK appreciate your business and want to ensure that your core return is as smooth as possible.
Please CLICK HERE for ATK Core Return Process
NOTE:
- Core return can be any Small Block Ford 351W engine
Engine Specifications
This 351W is built for daily drivers that need more power and torque.
- Horsepower: 300 hp
- Torque: 377 lb/ft
Block Information:
- Seasoned OE roller block
- Bore/Stroke: 4.060 in. x 3.500 in.
- Displacement: 351ci
Rotating Assembly:
- Crankshaft: OE Cast 1 piece seal
- Balance: 28oz external balance
- Rods: OE steel rod 5.955 in. stock bolts
- Compression Ratio: 9.1:1
- Pistons: Hypereutectic
- Rings: Moly
Camshaft Specs:
- Camshaft: Hydraulic roller
- Cam Duration @ .050": Intake 219 / Exhaust 219
- Cam Lift: Intake .498 in. / Exhaust .498 in.
- Lobe Separation Angle: 112lsa
- Timing Chain: Double roller
Cylinder Head Information:
- Cylinder Heads: OE E7TE cast iron
- Combustion Chamber: 62cc
- Valve Size: 1.77 in. Intake / 1.46 in. Exhaust
- Rocker Arms: Stamped steel 1.6 ratio
Oil Pan Information:
- Oil Pan: Rear sump truck pan
- Oil Pump: Melling Standard Volume
Engine Info
- Balancer: External 28oz
- Carburetor: Quick Fuel 680cfm vacuum secondary electric choke #793-HR-680-VS
- Distributor: Pro-Billet with Upgraded Melonized Gear
- Exhaust: 1-5/8" Headers
- Flexplate: Pioneer External 28oz 164 tooth
- Firing Order: 13726548
- Fuel Pump: Holley Mechanical 110gph #510-12-289-11
- Intake Manifold: Weiand Stealth dual plane #925-8023WND
- Octane: 91+
- Oil: 10W30 (Conventional / Non Synthetic)
- Oil Filter: Wix or K&N
- Spark Plugs: Autolite #417-24
- Spark Plug Gap: .035"
- Spark Plug Wires: 8mm
- Stall Converter: Stock
- Timing: 34-36 Degrees (Vacuum port plugged on carburetor)
- Water Pump: Late model LH inlet
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.
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Specifications:
I’m rebuilding a 1978 mustang 2 I know I’m going to have to do some work but will this fit in that car and can I used the 8.0 or 8.8 rear end?
will this motor work in a 79 ford bronco?
Will this work for a 1973 Ford Bronco, it was already outfitted with a 351, but want to replace with new. Also, what kind of transmissions can be used with this, auto or manual, 3 or 4 or 5 speed? Thank you
Paperwork says 5 qts of oil, does that include with the oil filter or is that another quart?
can this motor go on a stock transmission ? or do i half to beef up the transmission??
Does this comes as shown and do you need a specific computer or does it work with factory computer?
Can this go into a E4OD transmission
Will this engine fit in 1969 Mach 1?
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.
Tools:
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.