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ATK HP81 Ford 408 Stroker Base Engine 480HP

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#35020216

ATK HP81 Ford 408 Stroker Base Engine 480HP

Block: Seasoned 6.0L Iron Gen IV
Bore/Stroke: 4.030” x 4.000”
Displacement (cu.in): 408

Level Of Dress:

#1 Base Engine

$8,483.00

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Product Summary

Long Block Crate Engine Type, Valve Covers Included

Block: Seasoned 6.0L Iron Gen IV
Bore/Stroke: 4.030” x 4.000”
Displacement (cu.in): 408
Crankshaft: Manley 4340 forged 58 tooth reluctor wheel
Rods: Manley 4340 forged H beam 6.125” ARP 8740 bolts

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Key Specs

Crate Engine Type	Long Block
Engine Displacement	6.7 liters
Camshaft Type	Hydraulic Roller
Cylinder Head Material	Aluminum
Carburetor Included	No

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ATK Engines HP81 Details

Engine Specifications:

HP: 480

TQ: 500

Block: Seasoned OE roller block 1993-1997

Bore/Stroke: 4.040 x 4.000

Displacement: 408

Crankshaft: Scat 4340 forged internal balance

Rods: Scat 4340 forged H beam with ARP 8740 bolts

Pistons: Forged 10.1 compression

Rings: Moly

Camshaft: Hyd. Roller

Cam Specs: 235/238 @50 .573in/.582ex 112LSA

Timing Chain: Double roller

Cylinder Heads: Dart aluminum 58cc/195cc 2.02/1.60

Rocker Arms: Aluminum 1.6 roller rockers

Oil Pan: Moroso front sump 7qt street/strip pan

Oil Pump: Melling high volume

Recommended Components:

Balancer: Internal balance

Flexplate/Flywheel: Internal balance

Intake Manifold: Edelbrock performer RPM air gap dual plane #7581

Distributor: Pro billet (with upgraded melonite or steel gear)

Water Pump: Per application

Carburetor: Quick Fuel 780CFM vacuum secondary’s electric choke #HR-780

Fuel Pump: Holley mechanical 110GPH #12-289-11

Spark Plugs: Autolite #3923

Spark Plug Wires: 8mm

Engine Info:

Oil: Conventional / Non Synthetic 10W30

Oil Filter: Wix or K and N per application

Timing: 34-36 Degrees

Spark Plug Gap: .035”

Firing Order: 13726548

Octane: 91+

Stall Converter: 2500+

Exhaust: 1 3/4 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.

Guides & Documents

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 HP81 Specifications

KEY SPECS
MFG. Part #	HP81
Brand	ATK Engines
Crate Engine Type	Long Block
Engine Displacement	6.7 liters
Camshaft Type	Hydraulic Roller
Cylinder Head Material	Aluminum
Carburetor Included	No
Intake Manifold Included	No
Distributor Included	No
Valve Covers Included	Yes
Engine Balance	Internal
Cylinder Heads Included	Yes
Rear Main Seal Style	1-piece
Throttle Body Included	No
Oil Pan Included	Yes
Timing Cover Included	Yes
Water Pump Included	No
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
Assembled	Yes
Material Type	Cast Iron
GTIN Code	00653517259593
Sold in Quantity	Each
Crate Engine Family	Ford Windsor
Supercharger Included	No

Ratings & Reviews

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Fitment

1962-1963 AC Shelby Cobra

Ford 260

1964 AC Shelby Cobra

Ford 289

1968-1973 AC Shelby Cobra

Ford 289

1967 DeTomaso Mangusta

Ford 289

1968-1972 DeTomaso Mangusta

Ford 302

1988-1989 DeTomaso Pantera

Ford 351W

1963 Ford 300

Ford 260
Ford 289

1966-1967 Ford Bronco

Ford 289

1968 Ford Bronco

Ford 289
Ford 302

1969-1977 Ford Bronco

Ford 302

1978-1979 Ford Bronco

Ford 351W

1980-1984 Ford Bronco

Ford 302
Ford 351W

1985-1996 Ford Bronco

5.0L Ford Small Block Windsor
Ford 351W

1962 Ford Club Wagon

Ford 221
Ford 260

1963-1964 Ford Club Wagon

Ford 260
Ford 289

1965-1967 Ford Club Wagon

Ford 289

1962 Ford Country Sedan

Ford 221
Ford 260

1963-1964 Ford Country Sedan

Ford 260
Ford 289

1965-1967 Ford Country Sedan

Ford 289

1968 Ford Country Sedan

Ford 289
Ford 302

1969-1974 Ford Country Sedan

Ford 302
Ford 351W

1962 Ford Country Squire

Ford 221
Ford 260

1963-1964 Ford Country Squire

Ford 260
Ford 289

1965-1967 Ford Country Squire

Ford 289

1968 Ford Country Squire

Ford 289
Ford 302

1969-1974 Ford Country Squire

Ford 302
Ford 351W

1987-1991 Ford Country Squire

5.0L Ford Small Block Windsor

1964 Ford Custom

Ford 260
Ford 289

1965-1967 Ford Custom

Ford 289

1968 Ford Custom

Ford 289
Ford 302

1969-1972 Ford Custom

Ford 302
Ford 351W

1964 Ford Custom 500

Ford 260
Ford 289

1965-1967 Ford Custom 500

Ford 289

1968 Ford Custom 500

Ford 289
Ford 302

1969-1974 Ford Custom 500

Ford 302
Ford 351W

1975-1977 Ford Custom 500

Ford 351W

1968-1974 Ford E-100 Econoline

Ford 302

1975 Ford E-100 Econoline

Ford 302
Ford 351W

1976-1978 Ford E-100 Econoline

Ford 351W

1979-1983 Ford E-100 Econoline

Ford 302
Ford 351W

1975-1978 Ford E-100 Econoline Club Wagon

Ford 351W

1979-1983 Ford E-100 Econoline Club Wagon

Ford 302
Ford 351W

1975 Ford E-150 Econoline

Ford 302
Ford 351W

1976-1978 Ford E-150 Econoline

Ford 351W

1979-1984 Ford E-150 Econoline

Ford 302
Ford 351W

1985-1996 Ford E-150 Econoline

5.0L Ford Small Block Windsor
Ford 351W

1975-1978 Ford E-150 Econoline Club Wagon

Ford 351W

1979-1984 Ford E-150 Econoline Club Wagon

Ford 302
Ford 351W

1985-1996 Ford E-150 Econoline Club Wagon

5.0L Ford Small Block Windsor
Ford 351W

1968-1974 Ford E-200 Econoline

Ford 302

1975 Ford E-250 Econoline

Ford 302
Ford 351W

1976-1978 Ford E-250 Econoline

Ford 351W

1979-1984 Ford E-250 Econoline

Ford 302
Ford 351W

1985-1991 Ford E-250 Econoline

5.0L Ford Small Block Windsor
Ford 351W

1992-1996 Ford E-250 Econoline

Ford 351W

1975-1978 Ford E-250 Econoline Club Wagon

Ford 351W

1979-1980 Ford E-250 Econoline Club Wagon

Ford 302
Ford 351W

1981-1991 Ford E-250 Econoline Club Wagon

Ford 351W

1968-1974 Ford E-300 Econoline

Ford 302

1975 Ford E-350 Econoline

Ford 302
Ford 351W

1976-1978 Ford E-350 Econoline

Ford 351W

1979-1982 Ford E-350 Econoline

Ford 302
Ford 351W

1983-1996 Ford E-350 Econoline

Ford 351W

1977-1978 Ford E-350 Econoline Club Wagon

Ford 351W

1979-1980 Ford E-350 Econoline Club Wagon

Ford 302
Ford 351W

1981-1996 Ford E-350 Econoline Club Wagon

Ford 351W

1996 Ford Econoline Super Duty

Ford 351W

1975-1976 Ford Elite

Ford 351W

1996-2001 Ford Explorer

5.0L Ford Small Block Windsor

1969-1977 Ford F-100

Ford 302

1978-1979 Ford F-100

Ford 302
Ford 351W

1980 Ford F-100

Ford 302

1981 Ford F-100

Ford 255
Ford 302
Ford 351W

1982 Ford F-100

Ford 255
Ford 302

1983 Ford F-100

Ford 302

1975-1977 Ford F-150

Ford 302

1978-1984 Ford F-150

Ford 302
Ford 351W

1985-1996 Ford F-150

5.0L Ford Small Block Windsor
Ford 351W

1969-1977 Ford F-250

Ford 302

1978-1984 Ford F-250

Ford 302
Ford 351W

1985-1997 Ford F-250

5.0L Ford Small Block Windsor
Ford 351W

1972-1977 Ford F-350

Ford 302

1978-1980 Ford F-350

Ford 302
Ford 351W

1981-1994 Ford F-350

Ford 351W

1995-1997 Ford F-350

5.0L Ford Small Block Windsor
Ford 351W

1962 Ford Fairlane

Ford 221
Ford 260

1963-1964 Ford Fairlane

Ford 260
Ford 289

1965-1967 Ford Fairlane

Ford 289

1968 Ford Fairlane

Ford 289
Ford 302

1969-1970 Ford Fairlane

Ford 302
Ford 351W

1978-1979 Ford Fairmont

Ford 302

1980-1982 Ford Fairmont

Ford 255

1962 Ford Falcon

Ford 221
Ford 260

1963 Ford Falcon

Ford 260

1964 Ford Falcon

Ford 260
Ford 289

1965-1967 Ford Falcon

Ford 289

1968 Ford Falcon

Ford 289
Ford 302

1969-1970 Ford Falcon

Ford 302
Ford 351W

1962-1963 Ford Falcon Sedan Delivery

Ford 260

1964 Ford Falcon Sedan Delivery

Ford 260
Ford 289

1965 Ford Falcon Sedan Delivery

Ford 289

1963 Ford Ford 300

Ford 260
Ford 289

1963-1964 Ford Galaxie

Ford 260
Ford 289

1965-1967 Ford Galaxie

Ford 289

1963-1964 Ford Galaxie 500

Ford 260
Ford 289

1965-1967 Ford Galaxie 500

Ford 289

1968 Ford Galaxie 500

Ford 302

1969-1974 Ford Galaxie 500

Ford 302
Ford 351W

1972-1974 Ford Gran Torino

Ford 302
Ford 351W

1975-1976 Ford Gran Torino

Ford 351W

1975-1977 Ford Granada

Ford 302
Ford 351W

1978-1979 Ford Granada

Ford 302

1980 Ford Granada

Ford 255
Ford 302

1981 Ford Granada

Ford 255

1964-1969 Ford GT40

Ford 289

1965-1967 Ford LTD

Ford 289

1968 Ford LTD

Ford 289
Ford 302

1969-1974 Ford LTD

Ford 302
Ford 351W

1975-1976 Ford LTD

Ford 351W

1977-1980 Ford LTD

Ford 302
Ford 351W

1981-1982 Ford LTD

Ford 255
Ford 302
Ford 351W

1983-1984 Ford LTD

Ford 302
Ford 351W

1985-1986 Ford LTD

5.0L Ford Small Block Windsor
Ford 351W

1987-1991 Ford LTD Crown Victoria

5.0L Ford Small Block Windsor
Ford 351W

1977-1979 Ford LTD II

Ford 302
Ford 351W

1971-1977 Ford Maverick

Ford 302

1964 Ford Mustang

Ford 260
Ford 289

1965-1967 Ford Mustang

Ford 289

1968 Ford Mustang

Ford 289
Ford 302

1969-1973 Ford Mustang

Ford 302
Ford 351W

1979 Ford Mustang

Ford 302

1980-1981 Ford Mustang

Ford 255

1982 Ford Mustang

Ford 255
Ford 302

1983-1984 Ford Mustang

5.0L Ford Small Block Windsor
Ford 302

1985-1994 Ford Mustang

5.0L Ford Small Block Windsor

1995 Ford Mustang

5.0L Ford Small Block Windsor
Ford 351W

1975-1978 Ford Mustang II

Ford 302

1962 Ford Ranch Wagon

Ford 221
Ford 260

1963-1964 Ford Ranch Wagon

Ford 260
Ford 289

1965-1967 Ford Ranch Wagon

Ford 289

1968 Ford Ranch Wagon

Ford 289
Ford 302

1969-1974 Ford Ranch Wagon

Ford 302
Ford 351W

1960-1961 Ford Ranchero

Ford 289

1962-1964 Ford Ranchero

Ford 260

1965-1967 Ford Ranchero

Ford 289

1968 Ford Ranchero

Ford 289
Ford 302

1969-1974 Ford Ranchero

Ford 302
Ford 351W

1975-1976 Ford Ranchero

Ford 351W

1977-1979 Ford Ranchero

Ford 302
Ford 351W

1963 Ford Sprint

Ford 260

1964 Ford Sprint

Ford 260
Ford 289

1977-1979 Ford Thunderbird

Ford 302
Ford 351W

1980-1981 Ford Thunderbird

Ford 255
Ford 302

1982 Ford Thunderbird

Ford 255

1983-1984 Ford Thunderbird

Ford 302

1985-1988 Ford Thunderbird

5.0L Ford Small Block Windsor

1991-1993 Ford Thunderbird

5.0L Ford Small Block Windsor

1968 Ford Torino

Ford 289
Ford 302

1969-1974 Ford Torino

Ford 302
Ford 351W

1975-1976 Ford Torino

Ford 351W

1980 Lincoln Continental

Ford 302

1982-1984 Lincoln Continental

Ford 302

1985-1987 Lincoln Continental

5.0L Ford Small Block Windsor

1980-1983 Lincoln Mark VI

Ford 302

1984 Lincoln Mark VII

Ford 302

1985-1992 Lincoln Mark VII

5.0L Ford Small Block Windsor

1981-1984 Lincoln Town Car

Ford 302

1985-1990 Lincoln Town Car

5.0L Ford Small Block Windsor

1977-1980 Lincoln Versailles

Ford 302

1964 Mercury Caliente

Ford 260
Ford 289

1965-1967 Mercury Caliente

Ford 289

1966-1967 Mercury Capri

Ford 289

1979 Mercury Capri

Ford 302

1980-1981 Mercury Capri

Ford 255

1982 Mercury Capri

Ford 255
Ford 302

1983-1984 Mercury Capri

Ford 302

1985-1986 Mercury Capri

5.0L Ford Small Block Windsor

1987-1991 Mercury Colony Park

5.0L Ford Small Block Windsor

1960-1961 Mercury Comet

Ford 260

1962 Mercury Comet

Ford 221
Ford 260

1963 Mercury Comet

Ford 260

1964 Mercury Comet

Ford 260
Ford 289

1965-1967 Mercury Comet

Ford 289

1968 Mercury Comet

Ford 289
Ford 302

1969 Mercury Comet

Ford 302

1971-1977 Mercury Comet

Ford 302

1967 Mercury Commuter

Ford 289

1967 Mercury Cougar

Ford 289

1968 Mercury Cougar

Ford 289
Ford 302

1969-1971 Mercury Cougar

Ford 302

1977-1979 Mercury Cougar

Ford 302

1980-1981 Mercury Cougar

Ford 255
Ford 302

1982 Mercury Cougar

Ford 255

1983-1984 Mercury Cougar

Ford 302

1985-1988 Mercury Cougar

5.0L Ford Small Block Windsor

1991-1993 Mercury Cougar

5.0L Ford Small Block Windsor

1963 Mercury Country Cruiser

Ford 260
Ford 289

1964 Mercury Cyclone

Ford 260
Ford 289

1965-1967 Mercury Cyclone

Ford 289

1968 Mercury Cyclone

Ford 289
Ford 302

1969-1971 Mercury Cyclone

Ford 302

1979-1980 Mercury Grand Marquis

Ford 302

1981-1982 Mercury Grand Marquis

Ford 255
Ford 302

1983-1984 Mercury Grand Marquis

Ford 302

1985-1991 Mercury Grand Marquis

5.0L Ford Small Block Windsor

1979-1980 Mercury Marquis

Ford 302

1981-1982 Mercury Marquis

Ford 255
Ford 302

1985 Mercury Marquis

5.0L Ford Small Block Windsor

1962 Mercury Meteor

Ford 221
Ford 260

1963 Mercury Meteor

Ford 260
Ford 289

1975-1979 Mercury Monarch

Ford 302

1980 Mercury Monarch

Ford 255
Ford 302

1968 Mercury Montego

Ford 289
Ford 302

1969-1974 Mercury Montego

Ford 302

1997-2001 Mercury Mountaineer

5.0L Ford Small Block Windsor

1962 Mercury Villager

Ford 221
Ford 260

1963 Mercury Villager

Ford 260

1964 Mercury Villager

Ford 260
Ford 289

1965-1967 Mercury Villager

Ford 289

1966-1967 Mercury Voyager

Ford 289

1978-1979 Mercury Zephyr

Ford 302

1980-1982 Mercury Zephyr

Ford 255

1962 Shelby Cobra

Ford 260

1963-1964 Shelby Cobra

Ford 260
Ford 289

1965-1968 Shelby Cobra

Ford 289

1964-1967 Sunbeam Tiger

Ford 260