How to Identify a 351 Cobra Jet Engine

The 351 Cobra Jet is a high performance engine that was first introduced in 1968. It was available in both the Mustang and Cougar models. The engine featured a larger displacement than the standard 289/302 engines, as well as an upgraded camshaft and carburetor.

The most distinguishing feature of the 351 CJ is the “Cobra” logo on the air cleaner assembly.

  • Look for the “Cobra Jet” logo on the engine
  • This should be located on either the air cleaner or valve covers
  • Check the displacement of the engine
  • The 351 Cobra Jet was only produced in a 351 cubic inch displacement
  • Inspect the heads for special castings
  • The351 Cobra Jet heads have “CJ” cast into them, denoting their special casting number
  • Look at the carburetor and intake manifold setup
  • The 351 Cobra Jet used a specific carburetor and intake manifold that were different from other engines of its day

What is the Difference between a 351 Cleveland And a 351 Cobra Jet

The351 Cleveland and 351 Cobra Jet are two high performance V8 engines that were produced by Ford. Both engines were based on the small block Ford V8, but there are some key differences between them. The 351 Cleveland was introduced in 1969 and was produced until 1974.

It was a larger engine than the standard small block Ford V8, with a displacement of 4.0 L (242 cu in). The351 Cleveland had a cast iron block and heads, with hydraulic lifters and pushrod-operated valves. It used a carburetor for fuel delivery, and had a compression ratio of 8.4:1.

The power output of the 351 Cleveland ranged from300 hp to 400 hp, depending on the version. The 351 Cobra Jet was introduced in 1968 and was produced until 1971. It had a displacement of 4.1 L (250 cu in) and used an aluminum intake manifold to save weight.

The351 Cobra Jet also used carburetors for fuel delivery, but it had a higher compression ratio of 9:1. This resulted in an increased power output of 335 hp to 428 hp depending on the version. So, what’s the difference between these two engines?

Well, the biggest difference is in their size – the 351 Cleveland is slightly larger than the351 Cobra Jet. However, this doesn’t necessarily mean that the 351 Cleveland is more powerful – while it does have more potential power, the actual power output will depend on how it’s been tuned or modified.

How to Identify a 351 Cobra Jet Engine


How Do I Know What 351 Motor I Have?

There are a few ways to identify what 351 motor you have. One way is by the casting number on the engine block. Ford used different casting numbers for their351 engines throughout production.

Another way to identify your engine is by the vehicle it came in. The Ford Mustang was available with a351 Windsor engine from 1969-1973. The Bronco, Fairlane, Galaxie 500, and Ranchero were also available with a 351 Windsor engine during various years of production.

Finally, you can identify your 351 engine by its dimensions. The Windsor has a smaller bore than the Cleveland and will measure at 4” x 3.500”.

Did Ford Make a 351 Cleveland Cobra Jet?

In 1968, Ford introduced the Cobra Jet engine option for the Mustang. The 351 Cleveland was added to the lineup in 1969, and it too could be ordered with the Cobra Jet option. This made for a potent combination, as the CJ-equipped351 Cleveland Mustangs could churn out some serious power.

The 351 Cleveland Cobra Jet (CJ) was a high-performance V8 engine offered by Ford Motor Company in its muscle cars of the late 1960s and early 1970s. The CJ used a larger carburetor and had revised intake and exhaust manifolds, compared to the standard production 351 CID engine. It was created to compete with Chrysler’s Hemi engine in drag racing.

The first Cobra Jets were available in 428 cu in (7 L) displacement; however, only 50 units were built with this size.[1] In response to customer demand and after consulting racers such as “Dyno” Don Nicholson, Ford increased the displacement of the engine for 1969 to 460 cu in (7.5 L). A total of 1,357 units were built that year.[2][3]

For 1970, an improved version called the Super Cobra Jet was offered which included stronger connecting rods, forged pistons instead of cast ones,[4] larger valves,[5] and an improved camshaft.[6][7] That year saw 3,163 SCJ engines produced.

What is a 351 Cobra Jet?

The 351 Cobra Jet was a V8 engine produced by Ford Motor Company between 1968 and 1970. It was used in a variety of vehicles, including the Mustang, Torino and Cougar. The engine featured a 4-barrel carburetor and could produce up to 335 horsepower.

It was discontinued after 1970 due to emissions regulations.

What Motor is in the Cobra Jet?

The Cobra Jet is a high performance variant of the Ford Mustang that was first introduced in 1968. The original Cobra Jet engine was a 428 cubic inch V8 that produced 335 horsepower. In 1969, the engine size was increased to 429 cubic inches and the power output rose to 375 horsepower.

Today, modern Cobra Jet Mustangs are powered by a 5.0 liter supercharged V8 engine that produces over 700 horsepower.

how to identify if it's a Ford 302 or 351w fast


If you’re a Mustang enthusiast, then you know all about the 351 Cobra Jet engine. This powerful engine was first introduced in 1968 and was used in a variety of Ford vehicles until the early 1970s. So, how can you identify a 351 Cobra Jet engine?

Here are some things to look for: -The engine should have “351CJ” cast into the side of the block. -It should have 4 bolt main caps.

-The heads will have “CJ” stamped on them. -There should be an aluminum intake manifold with “CJ” cast into it. -The carburetor will have a “Holley 4360” stamp on it.

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