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#35020143

ATK HP291P Chevy 350 Base Engine 325HP

Oil: Conventional / Non Synthetic 10W30
Oil Filter: Wix or K&N
Timing: 34-36 Degrees

Level Of Dress:

#1 Base Engine

$3,610.00

/each

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Product Summary

Long Block Crate Engine Type, 9.1:1 Compression Ratio

Oil: Conventional / Non Synthetic 10W30
Oil Filter: Wix or K&N
Timing: 34-36 Degrees
Spark Plug Gap: .035”

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Key Specs

Crate Engine Type	Long Block
Compression Ratio	9.1:1
Engine Displacement	350 cu. in.
Camshaft Type	Hydraulic Roller
Cylinder Head Material	Cast Iron

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Need To Know

Made to Order

This custom item will ship when completed

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ATK Engines HP291P Details

Classic 350 with great street manners, and vacuum for all your power accessories.

HP: 330
TQ: 380
Block: OE block 4 bolt main 1pc seal 1987-2000
Bore/Stroke: 4.040 x 3.480
Displacement: 350
Crankshaft: OE Reground external balance rear of crank/internal balance front of the crank
Rods: OE powder metal 5.7"
Pistons: Hypereutectic 9.1:1 compression
Rings: Moly
Camshaft: Hyd. flat tappet
Cam Specs: 224/234 @50 .465in/.488ex 112LSA
Timing Chain: Double roller
Cylinder Heads: ATK cast iron 76cc/165cc 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 high volume

Recommended Components:

Balancer: PowerBond internal balance 8" #PB1046-N
Flexplate/Flywheel: Pioneer #FRA-159 external balance 168 tooth
Intake Manifold: Weiand stealth dual plane #8150
Distributor: HEI (Iron gear)
Water Pump: OE long pump
Carburetor: Quick Fuel 680CFM vacuum secondary's with electric choke #HR-680
Fuel Pump: Holley mechanical 110GPH #12-327-11
Spark Plugs: Champion #RV12C
Spark Plug Wires: 8mm

Engine Info:

Oil: Conventional / Non Synthetic 10W30 with Comp Cam zinc additive #159 for first 3000 miles
Oil Filter: Wix or K and N per application
Timing: 34-36 Degrees
Spark Plug Gap: .035"
Firing Order: 18436572
Octane: 91+
Stall Converter: 2200-2500
Exhaust: 1 5/8 Headers

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.

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Warranty (ATK Engines)

Technical Information (ATK Engines)

CARB Warning

Follow EPA, CARB, and state regulations for engine changes

Emissions warning: this part is for vehicle engine changes, not direct oem engine replacements. In California, engine changes are legal when done in compliance with California bureau of automotive repairs (bar) engine change policy. For assistance, call bar referee at: (800) 622-7733. And see https://bar.Ca.Gov/consumer/smog_check_program/engine_changes. All customers must comply with federal epa mobile source enforcement memorandum no. 1a (and addendum) and all applicable state regulations when conducting engine changes. Improper installation and/or use of this part in California may subject the installer and/or owner to a $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and laws of all states for use of this engine change part on makes or models of vehicles that render them noncompliant with applicable state and/or federal emission laws with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine

CA Prop 65

CARB warning

ATK Engines HP291P Specifications

KEY SPECS
MFG. Part #	HP291P
Brand	ATK Engines
Crate Engine Type	Long Block
Compression Ratio	9.1:1
Engine Displacement	350 cu. in.
Camshaft Type	Hydraulic Roller
Cylinder Head Material	Cast Iron
Piston Material	Hypereutectic Aluminum
Carburetor Included	No
Intake Manifold Included	No
Distributor Included	No
Valve Covers Included	Yes
Cylinder Heads Included	Yes
Throttle Body Included	No
Timing Cover Included	No
Oil Pan Included	Yes
Water Pump Included	Yes
Harmonic Balancer Included	No
Flexplate Included	No
Flywheel Included	No
Air Cleaner Included	No
Spark Plugs Included	No
Spark Plug Wires Included	No
Computer Included	No
Wiring Harness Included	No

GENERAL
Combustion Chamber Volume	76cc
Bore x Stroke (in)	4.040" x 3.750"
Material Type	Cast Iron
GTIN Code	00653517328824
Notes	Dipstick is located on the passenger side of the vehicle. Internal balance on the front, external balance on the rear of the crank.
Sold in Quantity	Each

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Questions & Answers

1 Question • 1 Answer

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Does this engine have good vacuum ?

by Tom

• a year ago

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