- Core return can be any Small Block Chevy 350ci engine, except 1992-1997 LT1 style engines
- Balancer: Internal balance
- Carburetor: Quick Fuel 680cfm vacuum secondary electric choke #793-HR-680-VS
- Distributor: HEI (iron gear)
- Exhaust: 1-5/8" Headers
- Firing Order: 18436572
- Flexplate/Flywheel: External balance 1987-Up
- Fuel Pump: Holley Mechanical 110gph #510-12-327-11
- Intake Manifold: ATK HP dual plain
- Octane: 91+
- Oil: 10W30 (Conventional / Non Synthetic)
- Oil Filter: Wix or K&N
- Spark Plug Gap: .035"
- Spark Plugs: Autotile #417-605
- Spark Plug Wires: 8mm
- Stall Converter: Stock
- Timing: 34-36 Degrees
- Water Pump: OE long pump
Disclaimer: 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.
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.
A great 350 crate engine with noticible idle, but still maintains good vacuum for all your power accessories.
- Horsepower: 350 hp
- Torque: 400 lb/ft
- Seasoned OE 4 bolt main 1pc seal 1996-2000
- Bore/Stroke: 4.040" x 3.480"
- Displacement: 350ci
- Crankshaft: OE Reground 1 piece seal crank
- Balance: External rear, internal front
- Rods: OE powder metal 5.7"
- Compression Ratio: 9.5:1
- Pistons: Hypereutectic
- Rings: Moly
- Camshaft: Hydraulic roller
- Cam Duration @ .050": Intake 220 / Exhaust 224
- Cam Lift: Intake .495" / Exhaust .502"
- Lobe Separation Angle: 110lsa
- Timing Chain: Double roller
Cylinder Head Information:
- Cylinder Heads: Vortec cast iron
- Combustion Chamber: 67cc
- Valve Size: 1.94" Intake / 1.50" Exhaust
- Rocker Arms: Stamped steel 1.5
Oil Pan Information:
- Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some Corvettes, and 1962-1967 Chevy II's
- Oil Pump: Melling standard volume
- Short Block
- Timing Set
- Cylinder Heads
- Valve Covers
- Timing Cover
- Oil Pan
- Oil Pump & Pickup Tube
Mid Dress Engines
- Consists of Base Engine Build
- Intake Manifold
- Water Pump
- Harmonic Balancer
- Flex Plate
- Consists of Mid Dress Engine Build
- Fuel Pump
- Carburetor or EFI
- Spark Plug Wires
- Spark Plugs
JEGS Easy Kits are designed by JEGS high performance racing professionals to help you get all the performance parts you need for your race car, hot rod or truck.
Will this fit in my 87 elcamino
Will this fit bolt up to 1965 Pontiac LeMans motor mounts
I have a 700R transmission - in a crate. What is needed to install with this engine
Will this work in a 1995 gmc 1500 pickup
Will this work in a 1995 hmm 1500 pickup
Is the Carb and intake installed or just comes as a kit of parts with engine?
What's your recommendation for a reasonable performance transmission, and converter that I can marry up with this engine?
What's the octane fuel requirement for this engine?
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.
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.