ATK HP291PC Chevy 350 Complete 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.
Engine Specifications:
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: Dart 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)
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
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.
Conventional / Non Synthetic 10W30 with Comp Cam zinc additive #159 for first 3000 miles
Oil Filter
Wix or K&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
Weight
450 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 & Handling
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.
In the Box
Contents
ATK HP291PC Chevy 350 Complete Engine 325HP
Guides & Accessories
Reviews
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REVIEWS, PRODUCT
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Questions & Answers
I have a 327 turbo fire v8 in my 1962 impala . Will this fit in my impala?
Asked by: Joey
We apologize for the confusion and inconvenience. We would have to advise you to speak directly to the manufacturer as these items drop ship. They can be reached by calling 866-721-2315.
Answered by: Kelly H
Date published: 2021-08-13
I have a 95 model Chevy p/u it has the 350 engine Distributor I've always known to all number one sparkplug bringing them 1 up And set the rotor 2 it Internet say in to the number 8 what's the answer
Asked by: Cowboy Don
We apologize for the confusion and inconvenience. We would have to advise you to speak directly to the manufacturer as these items drop ship. They can be reached by calling 866-721-2315.
Answered by: Kelly H
Date published: 2021-08-12
Will this work in a 1966 c10?
Asked by: itsyaboii_15
We apologize for the confusion and inconvenience. We would have to advise you to speak directly to the manufacturer as these items drop ship. They can be reached by calling 866-721-2315.
Answered by: Kelly H
Date published: 2021-08-12
Well this engine work and and 1964 impala
Asked by: Bread
We apologize for the confusion and inconvenience. We would have to advise you to speak directly to the manufacturer as these items drop ship. They can be reached by calling 866-721-2315.
Answered by: Caleb M
Date published: 2021-08-06
Will this motor fit in my 1970 el camino and I need a transmission also what do u recommend
Asked by: cabin7
We apologize for the confusion and inconvenience. We would have to advise you to speak directly to the manufacturer as these items drop ship. They can be reached by calling 866-721-2315.
Answered by: Caleb M
Date published: 2021-08-06
will this engine fit in a 1980 pontiac trans am
Asked by: onthelake
We would have to advise you to contact the manufacturer directly. They can be reached by calling: 866-721-2315.
Answered by: Kelly H
Date published: 2021-07-16
Will this fit a 89 chevy k5 blazer with standard xmsn?
Asked by: Drew
Yes this engine will fit a 1989 Chevy K5. some modification may be necessary.
Answered by: vince
Date published: 2021-06-02
I have a 1963 chevy c30 with a manual muncie 4 speed. It used to have a 250 I6. Would it fit with different engine brackets and would it fit my tranny?
Asked by: Chris
Yes it will fit with the proper motor mounts and a Chevy V8 engine Bell housing. You will need to alter the fuel system, electrical system and the exhaust system.