440 Six Pack or 6-BBL Specs

I’ve spent years researching and studying the 440 Six Pack engine. The Six Pack is one of those engines known by every muscle car lover. This makes people wonder about their specs. Therefore, let’s answer, what are the 440 Six Pack specs?

The 440 Six Pack has 440 cubic inches, a 4.32″ bore and 3.75″ stroke, 390 horsepower @ 4,700 RPM and 490 ft. lbs. of torque @ 3,200 RPM. It has a compression ratio of 10.5:1, 3-2 bbl carburetors, 2.08″ intake valves and 1.74″ exhaust valves. The Six Pack’s cam has a lift of .450″ intake and .458″ exhaust.

This article will examine the 440 Six Pack in more detail. I’ll take a look at the camshaft, intake manifolds, carburetors, crankshaft, connecting rods, cylinder heads and pistons. I’ll also examine the torque specifications, production and casting numbers.

1970 Dodge 440 Six Pack Engine.
1970 Dodge 440 Six Pack Engine.

440 Six Pack or 6BBL Specs: 1969-1971

Some people want to know, what is a 440 Six Pack engine? A 440 Six Pack engine is a 440 cubic inch engine made by Chrysler for Dodge muscle cars. It’s called a Six Pack because it has three 2 barrel carburetors.

What is a 440 6BBL engine? A 440 Six Barrel (440 6BBL) engine is a 440 cubic inch engine made by Chrysler for Plymouth muscle cars. It is the exact engine as a Six Pack but Chrysler put them in their Plymouths. The Six Pack and 6BBL have the same specifications. Other than the name, there are no differences.

The engine idled off the center carburetor and as long as you didn’t press down hard on the gas pedal, the engine operated with the center carburetor only.

440 Six Pack carburetors from the driver's side.
440 Six Pack carburetors – Driver’s side.

The outside carburetors are vacuum operated and both of them begin to open when the gas pedal is pressed down hard and the engine revs higher.

When driving around, the engine is operating with either 2 barrels or 6 barrels, never on 4 barrels.

As an owner of a 6BBL setup on a 440, I can tell you there is nothing more exciting than when the outboard carburetors start to open. It’s like the engine was given performance enhancing drugs and you’ll get pinned back into the seat.

The sound of air rushing into all six barrels, 1,350 cfms, is unmatched by any other street car. Before you know it, you’ll be coming off the gas and standing on the brake pedal because you’ll run out of road pretty fast.

440 Six Pack carburetors from the passenger side.
440 Six pack Carburetors from the passenger side.

The 440 Six Pack/6BBL was only produced for production cars for the following 3 years:

  • 1969
  • 1970
  • 1971

Rumor is three Six Packs snuck through in early ’72 but it is not considered a production year for them.

Each year there are some differences between the three with the greatest differences occurring from 1969 to 1970. Therefore, there’s three different 440 Six Pack engines made by Chrysler.

The following table includes all the specifications for the 440 Six Pack/6-BBL Engine:

440 Six Pack/6BBL Specs
Cubic inch440
Bore4.32″
Stroke3.75″
Cylinders8
Fuel typeGasoline
Block Cast Iron
Cylinder head materialCast iron
CarburetorInline 3X2 bbl (Holley)
Horsepower1969-1970: 390 HP @ 4,700 RPM
1971: 385 HP @ 4,700 RPM
Torque490 Ft. Lbs. @ 3,200 RPM
Compression Ratio1969-1970: 10.5:1
1971: 10.3:1
CamshaftHydraulic
Camshaft Specs .450″ Intake / .458″ Exhaust
Duration 268°/284°
@ .050 228°/241°
Overlap 46°
Cylinder headsOpen combustion chamber
Cylinder head valves2.08″ Intake / 1.74″ Exhaust
CrankshaftForged steel
Firing order
Cylinder numbering (front to rear)
1-8-4-3-6-5-7-2
Left Bank: 1-3-5-7
Right bank: 2-4-6-8
Oil capacity4 qt oil pan plus 1 qt for oil filter (1969)
6 qt oil pan plus 1 qt for oil filter (1970-1971)
Fuel line5/16″ fuel line
Fuel pumpMechanical
440 Six Pack/6BBL Engine Specifications

Carburetors

Let’s start with the three carburetors because, after all, it’s what makes the 440 Six Pack what it is. The three carburetor set up sitting on top of an engine is like staring at gold, people are just mesmerized.

All three carburetors are made by Holley from their 2300 series carburetors. In total there is 1,350 cfms:

  • Center carburetor: 350 cfm.
  • Front carburetor: 500 cfm.
  • Rear carburetor: 500 cfm.

It sounds like a lot of cfms and it is. Although 2 and 4 barrel carburetors are rated differently. Having a Six Pack is not equivalent to having a 1,350 cfm 4 barrel carburetor. It’s approximately equal to a 954 cfm four barrel carb.

Also, all the cfms are not opened fully until the engine revs up higher under heavy throttle. Even under full throttle, all six barrels do not instantly open, but they quickly get there.

Here’s a great video of a Six Barrel linkage under full throttle. The camera is mounted in the engine compartment pointed directly at the carbs. Great video and many hole shots too!

For the 1st carburetor linkage camera shots, fast forward to the 25 minute point of the video – enjoy!

The outer carbs have linkage bars connected to the middle carburetor. Although the middle carburetor doesn’t open the outer carbs under acceleration, vacuum does.

When the gas pedal is released, the middle carb linkage also closes the outer carbs at the same time. It’s shut down linkage. This can be seen in the video above.

I once had a Six Barrel set up on a 440 but the outer carburetors were mechanical and not operated under vacuum like the factory. They each had accelerator pumps. Think of it as a triple pumper set up.

Under acceleration they opened up directly and fully from mashing the gas pedal to the floor. All six barrels fully opened instantly, making it feel like the car was propelled forward by an unknown force.

Center Carburetor

The smaller two barrel is what the engine uses to idle and has a choke mechanism. The gas pedal connects to the throttle linkage on this carburetor.

  • Rated at 350 cfm.
  • 1.50″ butterflies.
  • It has the idle mixture screws.
  • Metering block with removable jets.
  • Has an accelerator pump.
  • It’s a center hung float.
  • Fuel inlet is on the passenger side.

Outer Carburetors

  • Rated at 500 cfm each.
  • 1.75″ butterflies.
  • No choke.
  • No ide mixture screws.
  • No accelerator pump.
  • Metering plate with gas passage orifice holes.
  • Contain a vacuum diaphragm.
  • Center hung float.
  • Fuel inlet on the passenger side.
440 Six Pack/6-BBL carburetors.
440 Six Pack/6BBL Carburetors.

Factory Carburetor Numbers

  • 1969 Center automatic: 4392
  • 1969 Center manual: 4391
  • 1969 Front: 4393
  • 1969 Rear: 4394
  • 1970 Center automatic: 4145 N95 (Cali. emissions)
  • 1970 Center manual: 4144 N95 (Cali. emissions)
  • 1970 Front 4175 N95 (Cali. emissions)
  • 1970 Rear 4365 N95 (Cali. emissions)
  • 1970 Center automatic: 4376
  • 1970 Center manual: 4375
  • 1970 Front: 4382
  • 1970 Rear: 4383
  • 1971 Center automatic: 4670
  • 1971 Center manual: 4669
  • 1971 Front: 4671
  • 1971 Rear: 4672
440 Six Pack outboard carburetor from Holley.
440 Six Pack Outboard Carburetor from Holley.

Carburetor Numbers for Holley Replacements

Many Six Packs were rebuilt or replaced over the years. Even an old looking carb may not be original.

From the Holley factory replacement carburetor manual:

  • 1969-1970: Center carburetor 4144 O.E. Number 3418550
  • 1969-1970: Outboard Carburetor 4365 O.E. Number 3462373
  • 1971: Center carburetor: 4670 O.E. Number 3512835
  • 1971: Outboard carburetor 4672 O.E. Number 3512837

Intake Manifolds

Chrysler used two different intake manifolds. In 1969, they reached out to Edelbrock and had them produce an aluminum intake manifold.

In 1970 and 1971 Chrysler produced their own cast iron version. Both manifolds have a heat crossover in the middle where engine coolant crosses under the middle carb area.

1969 440 Six Pack intake manifold.
1969 440 Six Pack Intake Manifold – Edelbrock Aluminum

1969: Edelbrock Aluminum

The aluminum intake manifold is identified by the name Edelbrock located on the right front runner, #1.

It has a part number located between the front and center carburetor.

The part number for a 440 Six Pack Edelbrock intake manifold is:

  • CHRY3412046

Also, sometimes located on the right side heat riser is the following: CH6B. The speculation is it stands for Chrysler 6 barrel.

1969 440 Six Pack intake manifold.
1969 440 Six Pack Intake Manifold.

Rumor has it Edelbrock was unable to keep up with the demand. The Six Pack cars were a huge hit and the less expensive Six Pack cars were more popular than the Hemi.

1970-1971 Chrysler Cast Iron Intake

To keep up with demand, in 1970 and 1971, Chrysler made their own cast iron intake manifold which was identical to the aluminum version.

If you’re unsure, which is which, just pick one up. Believe me the cast iron one is very heavy, 57.4 pounds. The aluminum one is 17 pounds.

I’ve lifted this intake on and off a 440 a few times, some with the engine in the car. It’s definitely a shoulder and back workout, especially with the carbs still bolted on.

Also, the cast iron one has the Pentastar logo between the first and second carburetor and had the following casting numbers:

1970-1971 casting numbers for the cast iron 440 Six Pack/6BBL intake manifolds are:

  • 2946275
  • 2946276

The ones ending in 275 are earlier casting dates, the 276 manifolds are casted later.

1970 440 Six Pack Intake manifold casting number.
This 1970 Six Pack intake manifold has the early casting number – 2946275 – Its casting date is 07/19/69.

The story is the first cast iron manifolds had a porosity problem. While fixing the casting problem, there are rumors Chrysler used the aluminum Edelbrock to keep the production line moving.

Some ’70 cars have the aluminum, and the owners swear it’s original, but they aren’t the original owner so it’s impossible to know for sure.

I know of some original owners who switched to the aluminum intakes to save weight just after a few years of ownership.

The casting number is located on the left rear of the manifold on the runner for the #6 cylinder.

1970 Chrysler 440 Six pack intake manifold.
1970 Chrysler 440 Six Pack intake manifold.

There is a casting date located on the right front runner, #1, of the manifold.

Connecting Rods and Crankshaft Assembly

Many people have heard about the Six Pack rods and assume all 440 Six Packs came with the rods, but they didn’t.

The first year, 1969, the Six Pack or 6BBL engines came with the standard 440 engine connecting rods.

In 1970 and 1971, the connecting rods were beefed up across the beams resulting in a heavier, stronger rod.

These rods are called “Six Pack rods” but technically it’s inaccurate to call them that because the ’69 Six Pack didn’t have them.

1970-1971 440 Six Pack connecting rods.
1970-1971 440 Six Pack connecting rods.

Rumor has it drivers were revving the ’69 Six Pack motors higher than the regular 440s and were throwing rods out the side of the block.

While the “Six Pack rods” were beefier, many people today dislike them because they are too heavy and have the same bolt diameter as the regular 440.

Due to their extra weight, the ’70 and ’71 engines were externally balanced. A Six Pack damper contains an eccentric balancing ring while the ’69 engine damper is non weighted.

1970-1971 440 Six Pack damper.
1970-1971 440 Six Pack damper.

The balancing ring is .210″ thousandths thick.

The ’69 engine was internally balanced because it contained the lighter, regular 440 connecting rods.

The damper casting number for 1970-1971 440 Six Pack or 6BBL is:

  • 3512017
1969 and 1970-1971 440 Six Pack connecting rod comparison.
LEFT: 1969 440 Six Pack connecting rod RIGHT: 1970-1971 440 Six Pack connecting rod.

The 1970-1971 Six Pack connecting rods has the following casting number:

  • 2951908

The 1969 Six Pack connecting rods have the following casting number:

  • 1851535

Pistons

The compression ratio for the Six Pack/6BBL engines received a bump up to 10.5:1. They also have moly rings.

In 1971 the compression ration dropped to 10.3:1 which reduced the horsepower five to 385 HP. This signaled the beginning of the end for the mighty muscle car engines.

440 Six Pack pistons.
440 Six Pack pistons.

Most manufacturers cut back way more in ’71 but Chrysler did their best in ’71 to keep the Hemi and Six Pack just the way they were.

It’s nice to know the Hemi and Six Packs were retired with dignity and not a shell of their former selves.

The Six Pack pistons were flat top with 4 valve reliefs.

440 Six Pack Piston Specs:

  • Cast flat top with valve reliefs.
  • 10.5:1 compression in 1969-1970.
  • 10.3:1 compression in 1971.
  • Chrome moly rings.

Cylinder Heads

The 440 Six Pack engines used the same head castings as the 440 engines except for some differences.

The Six Pack heads had the following differences:

  • They had chrome valve stems.
  • Hemi valve springs were installed.
440 Six Pack 906 cylinder heads.
440 Six Pack 906 cylinder heads

In 1969-1970 the cylinder head casting number for a Six Pack is the following:

  • 2843906

For short, these heads are often called the 906 heads.

In 1971 the cylinder head casting number for a Six Pack is:

  • 3462346

For short these heads are often called the 346 heads.

1971 440 Six Pack 346 cylinder heads.
1971 440 Six Pack 3462346 Cylinder Heads.

It’s reported by some that a few 906 heads made their way onto early ’71 engines. The 346 heads had essentially the same exhaust ports with a change to the intake ports.

The 906 and 346 heads were both open chamber design.

Valvetrain Specs

The valve sizes for a 440 Six Pack/6BBL are:

  • 2.08″ intake
  • 1.74″ exhaust

They remained the same for each year and were the same size as a 440 without the Six Pack. As stated earlier the valve stems were chrome.

The valve springs used on a Six Pack engine were Hemi valve springs.

440 Six Pack rocker arms and shafts.
440 Six Pack Rocker Arms and Shafts.

The rocker arms for a 440 Six Pack pivot on rocker arm shafts. There is one shaft per head. There are spacers between the rockers.

Camshaft

The Six Pack and 6BBL engines used a different camshaft than the 440 but it had the same lift and duration.

The camshaft was a low-taper camshaft which used flat-face tappets (lifters). This enabled some rotation of the lifters in the lifter bore which was to reduce excessive wear and tear on the cam.

There is some differing opinions on the camshaft specs. Chrysler didn’t help when they advertised a larger cam at first then what was actually used.

Many magazine articles back in ’69 also had different specs from one article to the next.

The following camshaft specifications are from the Dodge/Plymouth 1969 and 1970 service manual engine specification sections:

EngineLiftDurationOverlap
440 Six Pack/6BBL.450″ Intake
.458″ exhaust
268° Intake/284° Exhaust
@ .050 228° Intake/241° Exhaust
46°
440 Six Pack/6BBL Camshaft Specifications
EngineIntake Opens (BTC)Intake Closes (ABC)Exhaust Opens (BBC)Exhaust Closes (ATC)
440 Six Pack/6BBL21°67°79°25°
440 Six Pack/6BBL Camshaft Specifications

Distributor

The 440 Six Pack has a dual breaker distributor, meaning it has dual points. Two points, instead of one, is much better than a single point distributor in any high performance or racing setup.

Typically, single point distributors are good until about 5,500 RPM. I know one thing. If you have a Six Pack, I’m sure you’ll be revving it past 5,500 RPM more than once.

Even though it doesn’t breath like a Hemi, the tach needle is going to shoot past 5,500. For this reason, Chrysler installed dual point distributors in their higher performance engines.

The stiffer spring load on the dual points is efficient up to 6,000 to 6,500 RPM.

440 Six Barrel engine.
440 Six Barrel Engine

Oil Pan and Capacity

The oil pan and capacity for a Six Pack are the following:

  • 1969: 4 quart oil pan plus 1 quart for the filter.
  • 1970-1971: 6 quart oil pan plus 1 quart for the filter.

The above numbers are taken directly from the ’69 and ’70-’71 service manuals.

Always verify your oil capacity. Many people claim to have different capacities and discrepancies with their dipsticks. Some people claim to have a 5 quart pan plus one with the filter.

If you ask 5 people about oil capacity, you may get 7 different answers.

The ’70 and ’71 are the same as the Hemi pan.

Windage trays for the Six Pack help keep the oil down in the oil pan and to prevent the oil from splashing around.

These helps keep the oil off of the crankshaft and connecting rods which can steal some horsepower. This is more important at higher RPMs than lower.

How to Identify a 440 Six Pack Block

There are 3 things you can do to help identify a 440 Six Pack/6-BBL block:

  • Check the front ID pad.
  • Check the casting number.
  • Check the engine serial number.
  • Check the partial vin number.

ID Pad

The engine ID pad is located on the front of the block to the right of the distributor. It’s flat and approximately 2″ x 3″. The numbers are stamped in and if it’s painted the numbers may be unreadable.

440 Six Barrel or Six Pack engine ID pad.
440 Six Barrel or Six Pack engine ID pad (F 440).

The ID pad can identify the model year and a high performance block.

Typically, there will be 2 lines. The top line having a letter followed by 440. The letter identifies the model year as follows:

  • C=1967
  • D=1968
  • E=1969
  • F=1970
  • G=1971
  • H=1972
  • J=1973
  • K=1974

For example:

  • F 440 – F stands for 1970 and 440 indicates the cubic inch.

The second line will have two numbers identifying the upper engine assembly date, the month and year. The date on a 440 Six pack should be followed by HP.

For example:

  • 12 7 HP – 12 7 indicates December 7th and HP indicates High Performance.
1970 440 6-BBL or Six Pack engine block.
1970 440 Six Barrel/Six Pack engine block

A letter C on the ID pad indicates a special crankshaft and pistons.

  • A Maltese cross on the ID pad will indicate .001″ undersized main bearings. Any numbers following the cross indicate the specific bearings that were undersized.
  • An R followed by a number on the ID pad will indicate which connecting rod journals are .001″ undersized.
  • A Maltese cross and X indicate the same as above but .010″ undersized bearings.
  • The letter A on the ID pad indicates .020″ oversize cylinder bores.
  • A diamond symbol on the ID pad indicates all the tappets are oversized by .008″
  • The letters O.S. on the ID pad indicate .005″ oversize valve stems.

If the ID pad is blank, it typically indicates a warranty block which replaced the original engine.

Casting Numbers

The casting number, along with the casting date, can tell you what size block and if the block is correct for the model year of your car.

The 440 Six Pack block has the casting numbers located on the left side (driver side) of the block. They are raised numbers and not stamped into the metal.

The 7 digit casting number for a 440 Six Pack engine or 440 from 1969-1971 is:

  • 2536430

The Six Pack/6BBL blocks have the same casting number as any other 440 block.

1970 440 Six Barrel/Six Pack block casting number and date.
1970 440 Six Barrel/Six Pack block casting number and date.

Along with the casting number, is the casting date of the block in the same area. The casting date indicates the day, month and year.

If the casting date is 11 02 70, it means the block was cast on November 2, 1970. However. this block would be for a 1971 model year car, not a 1970 model.

The casting date year and model year will not always match. Typically, if the block is cast after July, it is intended for use in the next model year.

If the block is cast before July, then the casting year usually matches the model year of the car.

Engine Identification/Serial Number (EIN)

440 blocks have the engine serial numbers stamped on the cylinder block oil pan rail at the left rear corner below the starter opening. They will be facing the ground with the engine installed in the car.

440 engine block identification number.
440 Engine Block Identification Number.

The engine serial number contains 14 characters and digits. The first letter or two indicate the assembly plant. The plant codes are as follows:

  • PM or M: Mound Road
  • PT or T: Trenton
  • MV or MN: Maryland
  • W: Windsor

The next three digits or numbers are the cubic inch displacement. For a 440 Six Pack, it would be 440.

The next 4 digits represent the 10,000-day calendar. This indicates the exact date it was built.

The following are the Chrysler 10,000 day calendars for 1969, 1907 and 1971:

1969 Chrysler 10,000 Day Calendar.
1969 Chrysler Engine 10,000 Day Calendar.
1970 Chrysler engine 10,000 day calendar.
1970 Chrysler Engine 10,000 Day Calendar.
1971 Chrysler Engine 10,000 day calendar.
1971 Chrysler Engine 10,000 Day Calendar.

The last 4 digits or numbers of the EIN are the daily sequential number of engines built.

Partial Vin

Beginning in 1968, a partial VIN are stamped on the engine.

On the passenger side of the block, just above the oil pan will be a long, narrow pad with a series of numbers and letter. They are the last 8 digits of the car’s vin number the engine was installed into.

1970 440 engine showing the car's partial VIN on the engine block.
1970 440 engine showing the car’s partial VIN on the engine block.

If the partial VIN matches the VIN number of the car, you have a matching numbers engine to the car.

  • The 1st number will indicate the model year.
  • The 2nd digit is a letter indicating what plant the car was built.
  • The last 6 digits (numbers) indicate the vehicle sequence number at that plant.

Air Cleaners

1969

In 1969 the 440 Six pack/6-BBL engine only had one type of air cleaner which came on the A12 code Road Runners and Super Bees.

1969 A12 440 Six Pack/6BBL air cleaner.
1969 A12 440 Six Pack/6BBL air cleaner.

The cars had a large open hood scoop which was part of the lift off fiberglass hood. The scoop was open and there was no way to close it off for rain or bad weather.

The special instructions on the air cleaner lid said to close off the hood scoop opening and open the under hood air inlets in the base during sub freezing weather or heavy rain storms.

1969 A12 440 Six Pack air cleaner instructions.
1969 A12 Six Pack air cleaner instructions.

The base of the large air cleaner is metal, painted black and rectangular. It has a rubber seal which mates to the hood when it is installed.

The air cleaner filter is oval. The lid is also oval and is painted orange to match the color of the engine.

The service manual recommended to inspect and/or clean the air filter after every oil change.

1970-1971

Shaker Scoop

There are a few different air cleaners for these two years starting with the shaker hood scoop. The shaker is a classier scoop which also says this car has plenty of horsepower.

440 Six Barrel Shaker Hood scop.
440 Six Barrel Shaker Hood Scoop.

The functional scoop allows air through the left and right vents located in the front. The flaps behind the vents can be open or closed by the driver inside the car with a lever mounted under the dash. The lever is similar to the air vent controls.

Air Grabber/Ramcharger or Twin Scoops

The oval base, air filter and lid was used and sealed to the metal work under the hood. The base was black and the lid was painted orange.

1970 GTX 440 Six Barrel Air Grabber hood scoop.
1970 GTX 440 Six Barrel Air Grabber hood scoop.

The twin scoops would be seen on the ’70 Super Bee. The Air Grabber/Ramcharger popup scoops would be found on the Road Runners and the ’71 cars.

Closed Air

Then there is the closed air filter which would come on the Rallye hood without scoops. The base, air filter and lid were all oval.

440 6BBL closed air cleaner.
440 6-BBL air cleaner – closed air with shield.

The base was painted black and the lid was orange to match the engine. The base had a shield in the front to protect the air cleaner from elements blown back from the fan.

The shield was also used on some California emission cars for fresh air hoods to reduce noise (California Noise Reduction)

440 Six Pack/6BBL Horsepower and Torque

In 1969 and 1970, the 440 Six Pack/6BBL engine was rated at 390 horsepower @ 4,700 RPM and 490 ft. lbs. of torque @ 3,200 RPM.

In 1971 it was rated at 385 horsepower @ 4,700 RPM and 490 ft. lbs. of torque @ 3,200 RPM.

The 5 less horsepower in 1971 was due to the compression change in 1971. The compression was reduced from 10.5:1 to 10.3:1.

1970 440 Six Pack Engine on the dyno. Find out how many horsepower.

440 Six Pack Production Numbers

In total 13,883 Six pack/6BBL engine cars were produced between 1969 and 1971.

  • In 1969 3,319 Six Pack/6BBL engine cars were produced.
  • In 1970 9,402 SixPack/6BBL engine cars were produced.
  • In 1971 1,162 Six Pack/6BBL engine cars were produced.

440 Six Pack/6-BBL Engine Casting Numbers

440 Six Pack/6-BBL Engine PartCasting Numbers/Years
440 Six Pack/6-BBL Block2536437 (1969-1971)
440 Six Pack/6-BBL Heads2843906 (1969-1970)
3462346 (1971)
440 Six Pack/6-BBL Intake ManifoldsCHRY3412046 (1969 Alumn. Edelbrock)
2946275 (1970-1971 Early)
2946276 (1970-1971 Later)
440 Six Pack/6-BBL Connecting Rods1851535 (1969)
2951908 (1970-1971 – “Six Pack Rods”)
440 Six Pack/6-BBL Engine parts casting numbers.

440 Six Pack/6-BBL Engine Torque Specifications

Part or BoltTorque
Foot-Pounds
Thread size
Main bearing caps85 ft. lbs.1/2-13
Crankshaft rear bearing seal retainer bolt30 ft. lbs.3/8-16
Connecting rod nut-plain45 ft. lbs.3/8-24
Camshaft Lockbolt35 ft. lbs.7/16-14
Cylinder head bolt70 ft. lbs.7/16-14
Cylinder head cover stud and nut40 in.-lbs1/4-28
Distributor clamp bolt200 in.-lbs/15 ft. lbs.5/16-18
Rocker shaft bracket bolt25 ft. lbs.3/8-16
Oil pan bolt200 in.-lbs/15 ft. lbs.5/16-18
Oil pan drain plug20 ft. lbs.1/2-20
Chain case cover15 ft. lbs5/16-18
Carburetor to manifold200 in.-lbs./7 ft. lbs.5/16-24
Intake manifold bolt40 ft. lbs.3/8-16
Exhaust manifold nut30 ft. lbs.3/8-24
Crankshaft bolt (Vibration Damper)135 ft. lbs.3/4-16
Vibration damper pulley bolts200 in.-lbs. (1969)
9 ft. lbs. (1970)
5/16-18
1/4-20
Clutch housing bolt30 ft.lbs.3/8-16
Flywheel to crankshaft55 ft. lbs.7/16-20
Flexplate to crankshaft55 ft. lbs.7/16-20
Flexplate to converter270 in.-lbs.5/16-24
Flywheel housing to cylinder block bolt50 ft. lbs.7/16-14
Torque converter housing bolt30 ft. lbs.3/8-16
Oil pump attaching bolt35 ft. lbs.3/8-16
Oil pump cover bolt10 ft. lbs.5/16-18
Fuel pump attaching bolt30 ft. lbs.3/8-16
Spark plug30 ft. lbs.14mm
Fan attaching bolt 15-18 ft. lbs.5/16-18
Starter mounting bolt50 ft. lbs.7/16-14
Water pump to housing bolt
Water pump housing to cylinder block bolt
30 ft. lbs.3/8-16
440 Six Pack/6-BBL Engine Parts Torque Specifications

Read More 440 Six Pack Articles!

How Fast is a 440 Six Pack or 6-BBL? 1/4 Mile and 0-60 Results

440 Six Pack Horsepower and Torque – Rated and Real HP

Cars With a 440 Six Pack From the Factory

How Much an Original 440 Six Pack Car is Worth: Recent Prices

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