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ATK HP99C Chevy 350 Vortec Complete Engine 290HP

Item #31960 Brand:ATK Engines

ATK HP99C Chevy 350 Vortec Complete Engine 290HP
ATK HP99C Chevy 350 Vortec Complete Engine 290HP
* * 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 4 to 5 weeks but usually ship within one week
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ATK HP99C Chevy 350 Vortec Engine, or Stage 3 Engine, is designed for those that are wanting to drop the engine into their project and fire it up. We try to outfit the engine as completely as possible to save you time and headaches. A GM Complete Dress engine typically consists of the Stage 2 build out plus the following: Carburetion, Spark Plug Wires, & Spark Plugs.

Introducing our new Econo 350CI Engine. We take one of ATK's Stock Replacement Remanufactured Vortec 350CI Engines and dress it out to be retrofitted for a Muscle car swap. The Vortec 350 engines are known for their better flowing Vortec Heads and Hyd. Roller Camshaft setup.This engine will come completely assembled as shown minus the fuel pump. These blocks DO NOT have a mechanical fuel pump provision and an electric fuel pump must be used.

**Image is for illustrative purposes only, engine will NOT have fuel pump provisions**

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


(1) ATK HP99C Chevy 350 Vortec Complete Engine 290HP


Engine Specifications:
HP 290
TQ 375
Block OE roller block 2 bolt main 1pc seal 1996-2000
Bore/Stroke up to 4.060” x 3.480”
Displacement 350CI
Crankshaft OE Reground external balance rear of crank/internal balance front of the crank
Rods OE powder metal 5.7”
Pistons Hypereutectic 9.4:1 compression
Rings Moly
Camshaft Hyd. roller
Cam Specs 220/224 @50 .495in/.502ex 112LSA
Timing Chain Single Roller
Cylinder Heads Vortec cast iron 64cc 1.94/1.50
Rocker Arms Stamped steel 1.5 ratio
Oil Pan Rear sump 5qt (not for Chevelles with steering behind crossmember, some corvettes and 62-67 chevy II’s)
Oil Pump Melling STD Volume
Balancer Internally balanced – PowerBond #PB1046-N
Flexplate/Flywheel Externally balanced – Pioneer #FRA-159
Intake Manifold Edelbrock Performer RPM dual plane #7116
Distributor HEI (Iron Gear)
Water Pump OE long pump
Carburetor Quick Fuel 600CFM Vacuum secondary’s electric choke #BR-67254
Spark Plugs Autolite #605
Spark Plug Wires 8mm
Engine Information:
Oil Conventional / Non Synthetic 10W30
Oil Filter Wix or K&N
Timing 34-36 Degrees
Spark Plug Gap .035”
Firing Order 18436572
Octane 91+
Stall Converter Stock
Exhaust 1 5/8 Headers
Weight 430 lbs.

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 in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. . ATK reserves the right to substitute parts used in engines if necessary.

Shipping Instructions and Core Information

Shipping is free and lift gate will be provided.

There is no core charge for this engine. You will not be required to send a core back to the manufacturer.

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