How Do I Identify A 383 Mopar?

by | Last updated on January 24, 2024

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Locate the ID boss. If the ID boss is located

on the block's right side

just below the cylinder head next to the distributor base, then the engine has an RB (Golden Lion) block; if the ID boss is located on top of the block directly in front of the intake manifold valley, then the engine is a B block.

What is the difference between a 383 and a 383 magnum?


there isn't any outside differences

between the 383 and 383 magnum so there isn't anything to worry about there. big block engines from the factory used a valley pan cover which was also the gasket between the intake and heads and it is held in place by 3 bolts and a plate on the front and rear of the engine.

How can you tell the difference between a 383 and a 440?


440 is wider/taller than a 383

, since it is a Raised block, or RB. The 383 is a B block. It will bolt to everything the 44o does, except perhaps the motor mounts.

How do I identify a Mopar motor?

Casting numbers for the small-block Mopar and big-block Mopar engine blocks can be found

on the left (driver's)

side of the block, and will consist of seven numerals. These numbers are different than the stamped eight-digit number found on the right side of the engine.

How do I identify a 383 Mopar engine?

There are two sure ways to identify a Chrysler 383 CID (cubic inch displacement) V8 engine. The first is

to locate and decode the large casting number on the left side of the block

. The second and easier way is to locate and decode the hand-stampings on the block's ID boss.

Will 440 heads fit on a 383?


There really is no such thing as a specific 440 head

. The 906's, 902,452,915 (and there a half dozen more heads) will fit any 383, 400 or 440. They are completely interchangeable. The intake manifolds for a 440 will not fit a 383/400 however without machining or adaptor plate to go the other way.

Will a 440 crank fit a 383?

the 440 crank in the 383 will give ya

426 inches plus the over bore

…. 030 usually is about 431 … use the longer 440 style rods to get a light piston….

How much horsepower can you get out of a 383 magnum?

The affordable and underrated 383 gets a huge boost in the arm by Muscle Motors—to the tune of

559 hp and 611 lb-ft.

The small engine in any car manufacturer's portfolio has a hard time getting any respect, and the same is true within the Chrysler brand. Take for instance the current Pentastar V-6.

How much horsepower does a 383 have?

The 383 stroker engines have been reported to achieve

330 horsepower with 410 foot-pounds of Torque

, 395 horsepower with 410 foot-pounds of Torque and 395 horsepower with 410 foot-pounds of Torque.

How many horsepower does a 383 Magnum have?

Engine type Chrysler B-series V-8 383 (FirePower) Displacement 6.3 l (383 ci / 6276 cc) Power

340 ps

(335 bhp / 250 kw) @ 5200 rpm
Torque 576 Nm (425 lb-ft) @ 3400 rpm Power / liter 54 ps (53 hp)

How do you tell if a 440 has a forged crank?

The cast 440 cranks are not cast-iron, they're cast from steel. Car guys want forged cranks. The best and most sure method for recognizing a forged crank is

to look for the parting lines on the counterweights

. A forged piece will have a wide, irregular rough patch.

How do I know if I have a 340 engine?

If the last three digits are 3-1-8, it's a 318. If they're 3-6-0, it's a 360. And

if it's 3-4-0

, it's a 340. Pretty straight forward.

How do I know if my engine is a 440?

440 has the

engine I.D. codes stamped on a machined flat surface

(about 3/4′′ x 2′′) located in front of the intke manifold towards the dirver's side of the car on the block. The 383/400 has this pad located just in front of the driver's side cylinder head where the head bolts to the block. Hope this helps.

Is a Mopar 383 a big block?

The

383 Chrysler B engine

is known as the Mopar big block that nobody loves. Typically, gearheads favor its beefier big brother, the 440. The 383 B is characterized by its large cylinder bore of 4.25 inches with a short stroke of 3.375.

What is a 440 Super Commando?

Chrysler engines were called T.N.T., Dodge dubbed Magnum 440 and

Plymouth

labeled Super Commando. (The best heads came on the 1967 engine, with closed chamber heads and “915” the last three identification numbers). All 440HP engines were part of the “RB” (raised block) family of big blocks from Chrysler.

Will 440 heads fit on a 400?


Yes they will work

,but there are a few things to consider. All big valve(2.08 intake-1.74exhaust)heads flow virtually the same. If the 440 heads in question are 906's or 915's they won't have hardened exhaust seats which should be installed by a competent machine shop.

David Evans
Author
David Evans
David is a seasoned automotive enthusiast. He is a graduate of Mechanical Engineering and has a passion for all things related to cars and vehicles. With his extensive knowledge of cars and other vehicles, David is an authority in the industry.