Boss 302 Mustang
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.
6-speed manual (2012–2013)
The Camaro/Mustang rivalry had begun in 1967 with the introduction of the Chevrolet Camaro by General Motors. The Camaro was the largest threat to the lead Ford had in the «pony car» field, a market segment largely created by Ford with the introduction of the Mustang in mid-year 1964. The performance of the Mustang with 289 and 390 engines was not up to the Camaro, with its small block and big block V8. In an effort to improve the Mustang’s image Ford made a 428 Cobra Jet V8 and a Ford Boss 302 engine optional for the 1968 mid-year and 1969 models, respectively.
The 1969–70 Boss 302 (Hi-Po) engine was created in 1968 for the SCCA’s 1969 Trans-Am road racing series. Available in the Boss 302 Mustangs of 1969–70, it’s a unique Ford small-block engine featuring a thin-wall, high nickel content block casting. It differed substantially from regular 302s, with 4-bolt mains, screw in freeze plugs, and heads using a canted valve design being developed for the planned 351 Cleveland (which debuted the following year). The construction was aided by the two engines sharing a cylinder head bolt pattern, though the Boss 302 heads had to have their coolant passages slightly modified. 
This optional engine, and indeed the entire vehicle package, including handling and aerodynamic aids, was made available for the express purpose of meeting the homologation guidelines to compete in the SCCA Trans-Am series, which limited engine displacement to 305 C.I.D. (5.0L) in order to compete.  The Boss 429 Mustang was born in a similar way, except with the intent of homologating Ford’s new «semi-HEMI» 429 C.I.D. (7.0L) engine (to race in NASCAR, instead of Trans Am. The much larger engine in the Boss 429 reflects the less restrictive engine displacement limits of NASCAR at the time.
The Boss 302 Mustang was designed by Larry Shinoda, a former GM employee. The car featured a reflective «c-stripe». The fake air scoops in the rear quarter panel fenders of the regular production 1969 Mustangs were eliminated on the Boss 302 models. A black horizontal rear window shade and a blackout hood were both options. It was one of the first production models with a front spoiler and rear deck wing. The name «Boss» came about when Shinoda was asked what project he was working on, he answered «the boss’s car» because the project was a secret.  Also Shinoda had called it the «Boss» as an homage to the new President of Ford Semon «Bunkie» Knudson who had brought Shinoda over from GM’s Chevrolet Division after Knudson had left.
Changes for the 1970 model year included side «hockey stick» stripes which started along the top of the hood, along with the 1970 grille which replaced the four headlights with two vents in the outside position while retaining dual headlights within the grille opening. The dual exhaust system was redesigned, along with the competition suspension and a standard Hurst shifter. The intake valves were slightly smaller, and cast aluminum valve covers replaced the chrome.  With a suggested price of $3,720, a total of 7,013 were sold.
In addition to a lower ride height, standard equipment included front disc brakes, larger sway bars, heavier duty spindles, reinforced shock towers, a four speed manual transmission, and the solid-lifter Boss 302 V8 engine, with its free-breathing Cleveland style heads, which had valves larger than most engines more than a third larger in displacement.  This «G Code» engine was rated at 290 hp (216 kW).
The 1970 model could accelerate from 0 to 60 mph (97 km/h) in 6.9 seconds, and the quarter mile (
400 m) took 14.6 seconds, reaching a speed of 98 mph (158 km/h). 
Although Ford’s Drag Pack option with a special oil cooler was never formally offered on the Boss 302, it was often included with the 4.30:1 rear axle ratio. This coveted option is recognizable when the hood is opened to reveal Ford’s vertically mounted oil cooler in front of the radiator. Ford also had an option for Boss 302’s and 429’s for deluxe interior rather than standard interior 
Trans-Am racing Edit
The SCCA Trans-Am series was popular in the late 1960s, especially after the birth of the «pony car». A type of «stock-car» racing usually held on road courses, the series limited maximum engine displacement to 5 liters, or 305 cubic inches. In an effort to be competitive, various Detroit car manufacturers produced some impressive variants of their usual «pony car» lineups in both road and track trim (for homologation purposes), equipped with high-performing variants of their «small» 300-inch class V8 engines in order to make as much power as possible from the limited displacement. The Boss 302 program was part of an effort by the Ford Motor Company to win the coveted SCCA Trans-Am Championship in 1969 and 1970. Penske Camaros had triumphed in 1968 and 1969. Team Penske switched to AMC Javelin the following year so the Boss 302’s direct competition in the 1970 series were the AAR Cudas, the Pontiac Firebird, the Team Chaparral Camaros, and the Penske AMC Javelins.
The Ford entry for 1969 and 1970 was the Boss 302 Mustang.  The factory effort was headed up by Bud Moore, who fielded two cars in the 1970 season, and won the championship that year. The Bud Moore Mustangs edged out Team Penske’s Javelins, and lead Penske driver Mark Donohue lost out to Bud Moore driver Parnelli Jones.  Then, in 1971 AMC came out with a redesigned Javelin and returned to the track with ex-Mustang driver, George Follmer and Mark Donohue. With Mark Donohue behind the wheel of the AMC Javelin, the Mustang and the others were defeated in 1971, and again with George Follmer driving the Javelin in 1972.  
Australian Touring Cars Edit
The Boss Mustang platform experienced racing success in Australia, with Canadian-born driver Allan Moffat, driving his Coca-Cola-sponsored Mustang to a recorded 101 wins from 151 starts. Moffat’s car was a gift from Ford’s American in-house race car fabrication and engineering facility, Kar Kraft, and finished off by Bud Moore Engineering. Moffat raced the Mustang in the Australian Touring Car Championship (ATCC) from 1969–1972. Although he failed to place in the top 10 in 1969, he finished 6th in 1970, 2nd in 1971 and 3rd in 1972. As of December 2012, this car has been fully restored to original, and is owned by Queensland based collector David Bowden who regularly shows the car at historic events throughout Australia. 
Since its restoration, the only person Bowden has allowed to drive the car (other than his son Dan) is its former owner Allan Moffat. Moffat has said that the car is his favourite car of his 30 years in racing, and that the gift of the car from Ford in 1969 was a pivotal moment in his career.
The Boss 302 is reproduced as a model and toy, with diecast models including Hot Wheels, Matchbox, and Ertl’s «American Muscle», and many others. It is recognizable by the «hockey stick» side stripe, rear louvers and chin spoiler (although those features can also signify a Boss 429 Mustang). The 1970 is available, but there are also some 4-headlight 1969 models as well.
Many «Boss clones» (i.e. replicas) have been created, with varying degrees of accuracy, out of regular fastback cars due to the relative rarity and expense of existing examples of the original automobiles, especially race-prepped models.
In 2007, a pair of restored 1969 Boss Mustangs sold for $530,000. 
In 2007, Saleen and American Racing Legend, Parnelli Jones, created a limited-edition version of the Mustang. Though often called the Saleen/Parnelli Jones S302, it was designed to pay homage to the legendary 1970 Boss 302 that Parnelli Jones had raced in back in the Trans Am series against Javelins, Camaros and Cudas. Equipped with a Saleen MOD 302 cid 3-valve V8, the S302 makes 400 hp (300 kW) and 390 lb⋅ft (529 N⋅m) of torque. On the outside, the S302 features a new front fascia, Saleen «Shaker» hood, rear window louvers, rear deck wing, «hockey stick» shaped side stripes, and custom Saleen/Parnelli Jones edition wheels. Production was 500 cars.