The Ford Mustang is easily the most iconic American car ever made, and continues to wow fans to this day, a whopping 60 years after its introduction. Most people think of the Mustang as the premier high-performance muscle car, which it is in 2025, but it was initially a playful pony car that put way more importance on fun than blowing off doors. It was actually a stroke of genius in 1964½ to release a sporty, affordable car that had no other purpose than to be enjoyed, and it clearly resonated with the public, becoming an overnight sensation, but it was by no means a barn burner.Meanwhile, buyers looking for some serious factory power in the Golden Age of American Muscle were buying anything but a Mustang. The biggest engine offered was a 271-horsepower 290-cubic-inch V-8, followed a couple of years later by a 390 with 320 ponies. Then, in 1968, Ford opened up the Mustang to its roster of monster big blocks, including the 428 Cobra Jet, and the pony car officially became a real street machine. This turning point in Mustang history would never have happened if not for a visionary Ford dealership owner who saw the true potential of the legendary ride. Tasca Ford's 1967 Mustang Creation Bring a Trailer Tasca Ford in Providence, Rhode Island, was a high-volume dealership that specialized in performance cars, most notably Mustangs. Around 1967, owner Bob Tasca Sr. became a little concerned that the other automakers were eclipsing Ford in the performance department. Pontiac's 400 Ram Air, Chevy's 396, and Mopar's 426 Street Hemi were absolutely smoking the Mustang's 390-cubic-inch V-8, so Tasca Sr. started offering engine upgrades to his customers. These weren't engine swaps like many other dealers did in the late '60s, but rather 390s built with higher-performance parts. While this did increase the Mustang's power, it still couldn't run with the big dogs of the Golden Age of American Muscle.Then, there was a moment of serendipity that would forever change Ford Performance, and it started with a pretty boneheaded move. Tasca Sr. had a Lime Gold 1967 Mustang 390 notchback former demo car that became his favorite ride and daily driver. One evening, when Senior was out to dinner, Tasca tech Billy Loomis and Tasca's sons took the 'Stang out for a joyride that ended in a less-than-joyous way. Apparently, Billy gunned the engine, thinking it was in 'D', but it was actually in '1', and without a shift, the valves floated, blowing the engine. When the boys eventually got the Mustang back to the dealership, Tasca Sr. was understandably angry, but it ended up being a pivotal moment. Rather than trying to rebuild the engine, Tasca Jr. had his parts guys drop a 428-cubic-inch V-8 under the hood they got from a Police Interceptor. The Ford FE 428 V8 Enters The Picture Bring a Trailer The 428 that went into the Mustang GT was no ordinary engine, however, as the parts department superpowered it, according to Hemmings. It was really a Frankenstein job with parts ripped from multiple vehicles and engines. They used C8AE-6049-K 406 heads from the 427 "Side Oiler," a 427 distributor, higher-flow fuel pump, Police Interceptor intake with a Holley four-barrel carburetor, a 390 GTA cam, and headers from a 427 Fairlane. It also got 427 rocker arms for more lift, and the mechanics tweaked the distributor as well as advancing the timing by three degrees for some serious power. This engine was never dynoed, though estimates put it at around 400 horsepower, but as the quarter-mile ETs came in, chances were that it was in excess of that. Mustang Becomes The King Of The Road In 1968 Bring a Trailer Tasca Sr. dubbed his newly equipped Mustang GT the "KR-8", which stood for King of the Road 1968. Carroll Shelby would later borrow this name for his 1968 GT500KR Mustangs that were equipped with 428 Cobra Jet V-8s, but we're kind of getting ahead of ourselves with that. Once Tasca Sr. got a chance to drive the KR-8, he realized that additional power required some mods to the transmission and suspension to make it a real track monster. He also clamped down the springs as well as moved the battery to the trunk in drag car fashion, and the result was impressive quarter-mile times. The first round of testing netted a 13.46-second ET at over 104 MPH, but eventually the car ran a 13.39-second quarter-mile at 105 MPH. Those are 425-horsepower 426 Hemi times, so the KR-8 was definitely more powerful than advertised. Blowing Off Doors In Dearborn, Michigan Ford Initially, Tasca Sr. wanted to keep his 428 Mustang on the DL, fearing it might be taboo and possibly hurt his dealership's standing with the Ford Motor Company. This car was too amazing to keep under wraps for too long, and word leaked out that Tasca Ford had built a Mustang that could actually compete with Hemi-powered Mopars. Soon, some Ford guys went out to Providence to check this car out for themselves, and they were so impressed that they asked Tasca Sr. to bring it out to Michigan for a demonstration. Tasca Sr., who was a personal friend of Henry Ford II, accepted the invitation because he wanted to prove that a faster Mustang could be built with existing parts.Rather than ship the KR-8, Tasca Sr. loaded it up with his sons Carl and Bob Jr. to drive it all the way to Dearborn, Michigan, in the late summer of 1967. At the Dearborn Proving Grounds, Tasca Sr.'s KR-8 went up against the best Ford had to offer, including a 427-equipped Mustang, and blew them all off the track. The Ford suits were astonished, while the engineers didn't actually believe it was 428 from a Police Interceptor. Tasca Sr. assured them that the engine and all the parts were standard Ford equipment that he had ordered from them. Until that point, there was a company-wide delusion that Ford engines were competitive with GM and Mopar, but once Tasca Sr. wowed 'em with the KR-8, they understood the power gap was a real concern. Engine Swapping With A Racecar The Henry Ford Ford asked Tasca Sr. if they could pull his engine to study it, and he was receptive, but pointed out that he'd need a replacement to drive the car back home. Ford obliged and let him take his pick from the "Experimental Garage," where he snagged the 427 Tunnel-Port from Lloyd Ruby's LeMans race car. As cool as that sounds, the engine broke a rocker arm on the way home, so Tasca pulled the pushrod and completed the journey on seven cylinders. Ford, meanwhile, dissected the Frankenstein 428 and determined that it was a viable high-performance engine that could help the Mustang catch up to Chargers, Chevelles, and GTOs that had been dusting the Mustang for too long. Customers Start Demanding The 428 Cobra Jet Mecum Ford was more than likely going to make a 428 engine available for its performance vehicles, but some public outcry helped make it a reality. In the November 1967 issue of Hot Rod magazine, there was a detailed account of Tasca Sr.'s 428-powered Mustang KR-8 and a corresponding ballot that asked readers to vote on whether Ford should put it into production. Several thousand fans ripped out that page, circled "yes" on the ballot, and mailed it to Ford. With that, there was no way Ford couldn't make a 428 Mustang, and by April 1968, they were hitting the showrooms across the country. Ford was going to call the engine the "428 KR Package", but they had actually spent a lot of money acquiring the rights to the Cobra name, so the V-8s were dubbed "Cobra Jets." Unleashing The 428 Cobra Jet On The Public NHRA Before the 428 Cobra Jet Mustangs hit the dealerships, Ford built 50 special edition lightweight drag cars to help build the hype. Many of these cars were distributed to Ford-sponsored drivers, but 10 of them went to Tasca Ford in Providence, Rhode Island, possibly as a thank you for Tasca Sr.'s vision of a high-performance Mustang. A few more ended up in the hands of racing legends like Gas Rhonda and Dyno Don Nicholson at the 1968 NHRA Winternationals, where the race-modified 428 Cobra Jet Mustangs put on a show, dominating in several different classes. Best of all, it took the Super Stock Eliminator title against a Hemi-powered Plymouth. Cobra Jet Applications In The Late 60s-Early 70s 1968-1970 Ford Mustang 1968-1970 Mercury Cougar 1968 Shelby GT500KR 1968-1969 Ford Fairlane 1968-1969 Ford Torino 1968 Mercury Comet 1968-1969 Mercury Cyclone The consumer version of the 428 Cobra Jet was unleashed mid-year in 1968 and carried the preposterously understated 335-horsepower rating. The whole point of Tasca Sr. building the KR-8 was to vastly improve the performance of the Mustang, which in 1967 topped out with the 320-horsepower 390 engine. To add 38 cubic inches of displacement and only gain 15 ponies is ridiculous, but the good news is, the 428 Cobra Jet was more like a 400+ horsepower engine. It made for the first 13-second Mustang in the 1968 GT, and that kind of quarter-mile ET doesn't come from 335 horsepower. Ford went completely nuts with their new engine, offering it in all of their intermediate models as well as the Mercury performance line-up. 428 Super Cobra Jet Wasn't As Super As Its Name Implies MecumFord also created the 428 Super Cobra Jet, and we can't get out of here without explaining the difference. Basically, the Super Cobra Jet used a different crankshaft and connecting rods, but wasn't rated with higher horsepower or torque than the Cobra Jet. Maybe the biggest change was that because of the placement of the Super Cobra Jet's engine oil cooler, cars equipped with it couldn't get factory air. Most casual enthusiasts probably assumed that because the Cobra Jet was badass that the Super Cobra Jet was next-level insane, but it's just a name that sounds cooler, but literally isn't because it didn't have an AC. Legacy And Fate Of The Mustang KR-8 Mecum Many readers may have noticed that there isn't a single sweet pic of the 1967 Tasca 428 Mustang KR-8, and that's because they simply don't exist. In turn, that is due to the fact that the car no longer exists either. The original 428 that Ford took to study was never returned, but the replacement 427 was rebuilt for an unfortunately short run. In October 1967, Bob Tasca Jr. had just gotten his driver's license and proceeded to wrap the KR-8 around a telephone pole. Thankfully, he wasn't seriously injured, but the car was toast. The engine, however, ended up in a 1968½ Mustang fastback, known as the Tasca East Coast Exhibition car, that also doesn't have any pics.Tasca Ford still exists today, though it has moved to Cranston, Rhode Island, where it still specializes in performance and has an on-site Shelby mod shop. Son Carl Tasca and grandson Bob Tasca III continue Senior's legacy by racing modified Mustangs professionally. As for the KR-8's impact, it is arguably the most important car in Ford performance history. Carroll Shelby recognized that the Mustang needed more juice, but his mods didn't come close to the gonzo performance of the Tasca Wondercar. The KR-8 transformed the Ford Mustang from a playful toy into a serious performance machine, and that late-'60s revolution is still felt today with the 500-horsepower 2025 Dark Horse.
