What is a Boss 351?

The 1971 Boss 351 was a replacement for the already rowdy and famous Boss 302. That car, so-named because of its 302-cubic-inch engine, gave way to the 351 with its larger Cleveland V-8. The 351-cubic-inch engine turned out 330 hp, 40 more than the Boss 302 managed.

How do I identify a 351 boss?

Engine ID Tag

Tags were also put on transmissions, axles, and steering boxes. The formats changed, but this one identifies the engine as a 351C, showing the code for when it was built, and the 625 number identifies it as a 351 Special, more commonly known as the Boss 351.

What is a Boss 351 engine?

The 351 in the '71 Boss was Ford's 351-cid Cleveland engine, nicknamed for the Ohio plant that built it. The 351C shared little more than bore and stroke spacing dimensions with the 351 Windsor used in the 1969 Mustang. Its advantage was deeper breathing, a result of huge ports and valves in the cylinder heads.

How much horsepower does a Boss 351 have?

It was awesome to see and hear these legendary Ford engines run in anger, and the Boss 351 demonstrated its worth by producing 383 hp and 391 lb-ft of torque. This output made it not only more powerful than the Boss 302 (by 9 hp), but arguably the most powerful muscle car small-block ever offered!

How fast is 351 boss?

Magazine test times had the Boss 351 ripping off 0-60 mph times under 6 seconds and quarter-mile times right at or just under 14 seconds, with trap speeds as fast as 104 mph.

1971 Ford Mustang BOSS 351 - Muscle Car Of The Week Episode 292

How much is a Boss 351 worth?

A: The average price of a Ford Mustang Boss 351 is $79,197.

Did Ford ever make a Boss 351?

The Boss 351 was built for just one year, with only 1,806 units produced—slightly more than the Boss 429. In addition to a Hurst shifter, the package included a competition-grade suspension and power front disc brakes.

Was the boss 351 a Windsor or Cleveland?

The 351-cid engine the Boss 351 was named for was manufactured in Cleveland, and it was as different from the Boss 302's Windsor as it could be. The Boss 302 had been built using a Windsor 302-cid engine, but then Cleveland heads had been added to the block due to their larger ports and valves.

When was the Boss 351 made?

Cleveland V-8 under its broad, tapered hood, the Ford Mustang Boss 351 represents one of the Blue Oval's last true muscle cars. Just 1,806 were built in 1971, their lone year of production, and they remain among the hottest performers in the world of small-block Fords.

What is a 351 Cobra Jet?

The Q-code 351 "Cobra-Jet" (also called 351-CJ, 351-4V) was produced from May 1971 through the 1974 model year. It was a lower-compression design that included open-chamber 4V heads.

What's the difference between a 351 Windsor and a 351 Cleveland Ford Motor?

Windsor valve covers use 6-bolt covers, whereas the Cleveland/Modified uses 8-bolt covers. Timing Chain. Cleveland/Modified engines have the timing chain recessed into the front of the block itself, and its timing cover is essentially just a flat piece of metal.

Is the 351 Cleveland a small block or a big block?

The 351C used the “Small Block” bellhousing bolt pattern. The 351M/400 used the “Big Block” bellhousing bolt pattern.

Was the Boss 429 a Hemi?

The racing engine dubbed the Boss 429, was an aluminum hemi-head engine design with gigantic ports and valves for high rpm use.

What Mustangs came with a 351?

What is a Boss 429?

The Boss 429 Mustang is a high performance Ford Mustang variant that was offered by Ford in 1969 and 1970. Engine builder Jon Kasse currently reproduces the cylinder heads that make up the "boss 9" engine architecture.

What does 4V heads mean?

The 4-V heads designed for four barrel induction systems have much larger 2.50″ x 1.75″ intake and 2.00″ x 1.74″ exhaust ports. Naturally the 4-V heads have larger valves to match the increased flow capacity of the ports and 4 venturi carburetor.

What is a boss car?

The Mustang Boss 302 is a high-performance variant of the Ford Mustang originally produced by Ford in 1969 and 1970, alongside its more powerful sibling the Boss 429 Mustang. Ford revived the name for another two year production run in 2012 and 2013. It was produced for the Trans Am racing series.

What was Eleanor Mustang?

The “Eleanor” is something of a reinterpretation of the 1967 Mustang Shelby GT500 that was designed specifically for the movie by Steve Stanford and Chip Foose. Five examples were built for shooting, and only three are said to still be in circulation today.

When did the 351 Cleveland come out?

The Cleveland (351C) was first used in 1970 on some early-production 1971 models, and was last produced in 1974, when it was replaced with the Modified (351M) model. The first number on the VIN code on your Cougar designates it a 1969 model year, and the last letter, "M," designates it a four-barrel carbureted engine.

How much horsepower did a 351 Cleveland engine have?

Horsepower rating for this engine was 266 at 5,400, and torque was 301 at 3,600. The Boss 351 engine shared a similar fate.

Why is it called Boss 302?

It was Larry Shinoda, a former GM stylist working at Ford, who created the car's unique styling and came up with the name BOSS 302 for the car and engine that would go into production so Ford could race it in 1969 and 1970. The BOSS 302 was offered in the 1969 and 1970 Mercury Cougar Eliminator as well.

How much is a 1971 Ford Mustang?

Prices began at $2,911 for the hardtop, $2,973 for the fastback, $3,227 for the convertible, $3,117 for the Grande and $3,268 for the Mustang Mach 1. The Boss 302 was gone, though a watered-down Mustang Boss 351 was offered, and the Boss 429 had vanished.

What makes a Ford engine a boss?

Boss is the internal name for a family of large-displacement V8 engines from Ford Motor Company intended to compete with Chrysler Hemi engines and General Motors' 6.0 L Vortec engines.

What makes a 429 a Cobra Jet?

Rather than re-engineer the stock head completely, the 429 Cobra Jet simply offered larger valves and ports, a higher compression ratio (11.3:1), and a number of other hardware upgrades to support an advertised 370hp rating (along with the ubiquitous 450 lb-ft of torque).