1969 Boss 429 Ford Mustang Test Drive NASCAR Streetcar Musclecar Kaase

We do a walk around and test drive (@ 7 minute) of a nasty nascar-powered street machine. This is a 27k mile original Boss 429, 4 speed, 391 gear, Ford Mustang Fastback. This was Ford’s attempt to win the NASCAR championship in the 60’s. #musclecar #mustang #boss429 #kaase
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[@skyking1328]

I had to comment again. In 1970 I worked for a Ford dealer in Florida. I just bought a new 390 Mach 1 Mustang from my employer. A 1969 Boss 429 appeared on the lot with high oil usage and smoking badly. I went to the office and they took back my GT 390 for an even trade.. Subsequently I put the KK429 into a local speed shop. We determined the brass valve guides were shaped oval due to the canted valve side thrust. I had the brass valve guides nuralized in the machine shop and the motor retuned for max performance. Oil consumption stopped and my bad days with the Bow Tie guys was over. The GT390 would loose a 1/4 mile drag to the SS396/375 HP Chevelle by a half a car length every time. Switching to the newly tuned Boss 429 (KAR KRAFT 1820) solved the problem. I never again lost a race to a Chevy. We ran in the "A" stock class at that time. What fun days. After getting married with a new baby and getting military orders, I sold the car for 3000 and left for WestPac with the US Navy. All I have left is my wedding pictures with my wife and I riding around in the Boss. I drove the car coast to coast and cold get about 8 miles per gallon driving normally. Gas was 31 cents a gallon or so. What memories ! Thank You !

[@dissrepair]

That’s awesome! I’m glad to hear those cars were used as they should have been back in the day!

[@duster0066]

Cool Ford story thanks. I had a 67 GT390 I took into the Air Force with me. I ended up cutting it up and making a Street Stock stock car out of it. It was terrible on the short track, but the motor was fine. I built it to iirc 1968 Ford Muscle Parts catalog specs. I called it a baby 427 cause it was built like one. I didn't know squat about making a car turn left, but I could build a mean stock class motor by then. The 340s, 350s, and 383s couldn't touch it. Motor alone made that car fast. There was only one motor that could out drag that stang on the straights, and it was a 396 Chevell.

[@scottsickel1763]

I come home from the hospital in my dad's 67 396/375 drop top with 4.11's in Stuttgart Germany. It didn't take long for him to grow tired of smoking everything on the auto bone from go to 100 but with those gears that's all she had. When we he was assigned back to the States he not only brought a new son but also a new 69 911 targa bought off the factory floor with only the test track miles all Porches must have on them to ensure there is truly "no substitute" before going to it's first lucky new owner.

[@tomwolak3362]

Youre one of the lucky ones dude. I wouldnt sell a boss 429 no matter what. Know a guy who had a 70 boss 302 and 429. He said the 302 was a freaking wonder on the drag circuit. When he lost to someone which wasnt often he went and got his 429 and down they went. Never lost to anyone in his boss 429 with mickey thompson stickeys on the back. That beast would run 11.70s in the qarter. I saw his time slips.

[@oldmusher]

@@tomwolak3362 Especially when you took off that hokey 735 cfm carb and put on an 850-950 cfm double pumper and headers. If you'd had the tires then that we have now, it would have been in the 10's. I raced in that era, and stock class was 7" wide slicks, max! Super Stock was 9". You wouldn't get away with the bigger carb in stock class, but in Super Stock, no problem.

[@chrispokorney6801]

Much Respect! Finally Someone Who Isn't AFRAID To Stand On It . Hell that's what they where built for.

[@Kgio-2112]

Amen

[@stevehall9585]

I thought he drove it easy. Didn't even smoke the tires.

[@ashtonpadilla5269]

@@stevehall9585 I agree. He gave it some gas for a second but he drove it too gently for my taste. Id have loved to see a 3rd gear pull from 20 all the way through 4th. Then again I have no idea what he went through getting this thing back together. That's why I could never get into restoration projects. I'll make it look clean, but I'm saving that money for repairs cuz I'm in it for the ride. To each his own. Plus such short gears make hard driving even harder on the parts so I can see why he's gentle.

[@twinturbogarage6893]

Hell yeah

[@joeschmo9838]

@Will iam 50 years old and if a true survivor easily $100k+ car

[@joshsteele4165]

This is literally my dream car the colour and everything is perfect

[@freedomfirst5420]

The '70 had more color options, and was more rare, but the '69 looked alot better, in my opinion.

[@vomikenonu4120]

Black Jade

[@morganimmesoete371]

...mine, too.

[@gsdfan8455]

You and me both!

[@dominicvega9267]

How unoriginal. Everyone and there mother wants one. Ford made cooler shit.

[@petezzzz]

Nothing like analog Ford horsepower. The Boss 429. My favorite Mustang of all time.

[@stripervince1]

Great muscle car.

[@fordmustang4584]

Yes it is 😊 the 429 boss will always be the king of the road

[@eatassonthefirstdate]

Ford's won in 1969 because the King switched to Ford that year, but in 1970 when Plymouth let Richard drive that Super Bird? 😅😅😅😅😅😅😅😅 he came running back to Dodge ASAP and continued his GOAT career. dude when he smashed THRU that concrete barrier? when he flipped? dude there's no way he survived that without divine intervention. go watch that wreck if u never seen it😮man is it NASTY dude.....

[@charleslasorsa6629]

I can't help but rewatch every time he puts his foot down on the gas, hearing that big block rev up. Sounds so good, brings a tear to my eye.

[@TheUsmc0802]

The holy Grail of Mustangs!

[@HEAVYCHEVY409]

I would say the 2nd the Holy Grail of Mustangs with always be...1967 Shelby Mustang GT500 fastback aka Eleanor!

[@markperry2827]

rare car. prefer the 428 SCJ

[@HEAVYCHEVY409]

@@markperry2827 That 1970 Boss 302 was no slouch either, the side stripes were awesome

[@TomaszKrokosz]

Totally agree. The Eleanor is artificial. This is the real thing!

[@Lightning546]

@@markperry2827 The only car that engine came in from the factory was the 1969 Mach 1, and maybe, the 1970 Mach 1. The better engine was the 427 SOHC which were in the Cobra's and the GT-40.

[@ricktotz4078]

Mustangs got to be the best Looking cars ever produced

[@randallbates9020]

To our younger friends watching, this is why cars from this era are called " muscle cars ". Todays cars are badass but it took a certain kind of someone to really run these beasts, drum brakes, poly glass tires, many with no power steering and big horsepower. I was born in 1964 and started driving in 1979, cars like these were everywhere for $700.00 to $1000.00. many of my friends are in the graveyard from driving these beasts. Thanks for the video. I enjoyed it.

[@mmjnice97]

😨😱 I need a time machine 😤😥

[@donr9208]

I was born in 64 also. Bought my first car in 1980. A Pontiac green 1968 GTO for a $1000. Good Times!

[@bronxhistory2051]

So true born in 66 the early 80"s every used car lot had one or two true late 60' early 70's muscle cars for under a grand. I ended up buying a 69 Camaro with a new paint job and black SS stripes for 2 grand in 84 . It was a 6cly though.

[@randallbates9020]

@@bronxhistory2051 those where good days. My first 2 cars, bought in 80+82 1970 Mercury Montego MX brougham with a 351 Cleveland out of a totalled Mach 1 and a 1968 Mercury Cougar XR 7 with a 351 Windsor. Both cars had hideaway headlights black interior, the Cougars was leather and could flat out haul the mail. Yup, those days are really missed.

[@Samsgarden]

I wouldn't say big horsepower by today's standards

[@bruceguertin9043]

I worked at Dearborn Assembly when that was built. I was the afternoon stick shift roll test driver. I got to drive more than a couple. The '69 cars were problematic, I worked a ton of overtime that year. not so much in 1970. The guy that showed me how to do that job had 1929 seniority and was leaving.

[@kalinandonov2799]

Wow, that's awesome! Could you share a bit more about the '69 problems? And in general about the Mustangs of the time.

[@OneFitnessGirl]

OMG, the sound of that car is amazing. I love that rumble. Nothing beats the classics.

[@oldsguy49]

if that's the stock exhaust, its just sic. I have never heard a car sound so good in all my 70 years. Yeow! I watched it several times and turned up the sound. Its just awesome!!!!!

[@dissrepair]

Thanks. Those poor exhaust pipes have there work cut out for them.

[@177SCmaro]

If I remember right Ford didn't put a whole lot of exhaust on these from the factory. I think it was mostly just crimped "mufflers" which were more like glorified glass packs without the packing.

[@danmyers9372]

oldsguy49 - the exhaust is either aftermarket or the mufflers are blown out. Stock Boss 429’s were not this loud. This car also clearly has a bigger than stock cam. Stock Boss 429’s did not lope at idle.

[@bismarck71]

Beautiful car. I would sleep in it if I ever have a chance to own such a masterpiece.

[@flat6fever680]

Love this comment!

[@dougreed9843]

I'm a mustang guy and this has to be the best car I've ever seen from the factory thank you

[@oscaracosta6976]

Doug Reed it was technically not factory built. It was built by a company called Karcraft. (I believe it’s spelled with a K). They customized the engine bay in order to fit the big block Hemi engine.

[@robintaylor1490]

@@oscaracosta6976 you are correct sir.

[@johnbryn7862]

Been a long time since I've heard an engine sound so smooth when held at limit. Thank you for showing off her internals.

[@hemi300c4]

In late 1969 I walked into the local Ford dealership in Louisville Kentucky. Setting on the floor was a Candy Apple Red Boss 429 with the price of $5000 written on the windshield. I was there to purchase a new Red with gold strips Mach1. As much as I wanted the Boss 9. It didn't fit my budget so I drove home in my new 69 $2800 351 4V Mach 1. As years past and I started a family. The Mach 1 was traded for a family sedan. I always thought about that amazing Boss 429 with the large hood scoop, Boss 429 decals on each fender and that huge SOHC engine. But being young and not a fortune teller. Who would have known the value of that car today. I have to add. Maybe because it was my first new car. I have never owned another vehicle that I enjoyed as much as my Red 1969 Mach 1 which also fetches large prices for restored copies. 1969 was a great year for Mustang styling and performance. Thanks for sharing this surviver Boss 429 and putting us in the passenger seat.

[@2012omar302]

Wow drive it like you stole it ... Hat goes off this guy for driving that boss 9 like you should just awesome 👍👍😎

[@nipslip6590]

Owning this car makes you the curator of your own museum..

[@iggyfritz7150]

It's called the Boss for a reason. I believe there is an engine builder called Kassie? Who was getting 900+ hp out of the Boss 429 on pump gas 😲. Also back in 94 there was a showdown between gm and ford to prove who could build the fastest 1/4 mile car. Gm choose a Camaro and Ford a Mustang. First race Gm won because the Boss 429 Was having pushrod problems. Being hard to find parts for the 429 they came up with a solution. After that the Mustang destroyed the Camaro consistently. Myself whitnessed that Mustang do a burnout at a cruise years later. It was like watching a nitro funny car! I spoke with the owner and he said at that time the car had 850hp and next time I would see them the car would have 1200hp! The display of the Mustang noted it as the fastest street car in America at that time. And being raised near the Dragstrip, I had no reason to doubt them. I dont recall the 0-100 time they displayed, but I remember my Brother and I laughing and saying that it was incrediable. Dont mess with the Boss. TRUE BLUE BABY 💥👍✌

[@jimmychanbers2424]

Sounds like ford doo-doo. Just like the rest of their junk

[@SGTmapleleaf]

Jimmy Chanbers hows your siste- I mean wife?

[@jimmychanbers2424]

@@SGTmapleleaf she's dead,dumbass just like most fords

[@neighborscomplaint6859]

John Kaase, A Ford Legend.

[@papawoody7352]

@@neighborscomplaint6859 yep....

[@craigunser4115]

Thanks for the ride! Could almost feel being pushed back in the seat when he stepped into it! What a badass muscle car, a dream car for sure. The raw horsepower is insane, and much respect to the owner for driving it like they were built for!

[@monsterpig3270]

LOVE the roar of the engine. That's when America was great and made the finest automobiles on the planet. Haven't heard that roar since High School.

[@Fauxbra]

Love that he isn't scared to drive it like it was meant to be driven.

[@jasonjones4695]

The baddest ass mustang ever made from a Chevy guy

[@rogerbeutler5671]

I'm a Ford guy but I want to tell you, I'd love to have one of the C8 Corvettes to park alongside the Ford GT

[@rogerbeutler5671]

Joey Balas, I hope your not referring to the Boss or the Ford GT.

[@ThePr8head]

Jason Jones DITTO! In my opinion the only true muscle car Mustang.

[@marlostanfield1087]

Terminator Cobras were the and are still the baddest

[@chocodiledundee1]

Jason Jones that’s is actually correct however he only existed and got recognition because his job was to create a car to compete with a Ford that created a new car category

[@rchoper21]

Baddest Ford ever in my book. I get goose bumps hearing a Boss 429! On my bucket list for a ride!

[@02hreblue30]

no goddamn way its better than a side oil cammer. you need to get realistic

[@santosbanuelos6661]

The comments of people that had in the 70s a Boss 429 are great! Lots of fun when we were younger, no pains , excellent music, no regrets, and of course lots of respect to all of the other excellent muscle cars ,be safe so we can continue enjoying such a wonderful memories

[@fernandes5986]

The Holly Grail of Mustangs. The Bullit Mustang used to be my favourite, but now this is the one. Greetings from Portugal.

[@Robert8455]

What a treat to actually get in and go for a nice rip in this classic. Makes me happy to see it's alive and well and being driven and enjoyed rather than stuffed away somewhere in a glass case.

[@Robert8455]

Glad to see this 50 year old is being enjoyed and driven as designed. The big block brute has always been my dream Mustang when I was a kid and even as an old man, I love it's nastiness. I'd be tempted to drop a modern 6 speed in it and update the brakes, suspension, fuel system etc... but then it wouldn't be what this one is, a very rare machine.

[@arttafil6792]

Yep, that’s the sound of Godzilla clearing his throat!

[@Trillioons]

Godzilla Japanese, should be bald eagles screeching instead.

[@harryjohnson8605]

Nothing can beat old school. Looks and power

[@oscarordonez4477]

That is the most beautiful sound I’ve ever heard

[@welikegoodies]

Omg stop it! That’s my favourite car in the entire world. Uhhhh it’s like I’m having an eargasm!! Beautiful beautiful car.

[@mustangmike4078]

Eargasm! That's good shit!

[@Hoodamax]

My hat off to the owner!!! He truly understands the reason to own one of these.

[@JC-gw3yo]

Thanks guys ... No often do we see the Boss 9 wind up..And this was just great!! They are like P51's. It's not war time and we don't have to push em to get the the real feel of the real monster

[@andymiller7897]

What I like about it is when you are sitting at a four way people looking at you and you are sitting in one of the baddest cars ever built

[@TheTreasureSeeker01]

You can sense the power just from watching the video. Gold and silver are not the only treasures I seek.

[@pbaker7160]

There's nothing like that sound. I wouldn't use the radio...ever.

[@kramnull8962]

That engine screams SPANK ME, through every gear....

[@MOST415]

I never understood why they even made them with a radio.. who needs one with that rumble to listen to

[@joeschmo9838]

Just like the '69 Roadrunner my Uncle gave my brother and I with a warmed up 440 in it. Has a newer radio and whatnot that we've yet to use in the month we've had her now simply because the engine sound is music in its own sense. Nothing beats that beautiful sound of turning on to a road and just mashing the GO pedal to the floor and hearing the car come to life :D

[@drd1924]

Exactly....any of my cars with a cammed up Ford....289, 429 etc....never even had a radio,,,,the engine was like music even when cruisin down the highway.

[@jerrytaylor4078]

That car is a rolling piece of art. My 1995 GTS has a radio, but I haven’t listened in years because I like the Flowmaster stereo much better.

[@garykish8951]

Totally different sound than a 351 C. Deeper with a wild sounding scream I've never heard on built small blocks. Very cool.

[@martycarter3306]

Now that's one of the best ford's ever build...all power....no computer chip!!!!!

[@jeffreygraves4120]

Damn that's some good information. Wow capable of 600 NA hp! Back then i bet that was lunacy.

[@jaywp1977]

When you’re a muscle car fanatic and KZbin suggests a video and realize this Boss 429 is just across town from you...

[@TomaszKrokosz]

This is the most desirable muscle car or any car that I can imagine. Thank you for this video showing the power and class of this beauty. I've got exactly the same car in my collection, only it's in 1/64 scale. :)

[@duke2304]

Thank you for actually driving the car the way it was meant to be driven. A very unique Ford muscle car, impressive.

[@thecreativecontractor]

3 gas stops later the 12 min video is finally complete 😄😄😄......very nice!!!!!

[@dissrepair]

Exactly!!! Lol

[@thenoobyoufckinghate9814]

It sounds like you're unleashing a monster!

[@ralphmoore7812]

A 735cfm carb. My boss 302 came with a 780cfm it breathes and it roars. Feed that big block.

[@Hathorr1067]

They went with a 735cfm on the 429 for insurance reasons and emission standards.

[@danmyers9372]

Ralph Moore - Around 1974 I was at my local drag strip in my 1970 Mach 1 351. A guy came out in a Boss 429 and was running 12.0 - 12.1 ET’s which was REALLY fast at that time. His only mods were long tube headers, a big 3 barrel Holly carb and slicks. He was definitely the big dog that day amongst the street driven cars.

[@danmyers9372]

Manabozo - See my other note here. You are dead on!

[@ryanjamieson8779]

boss 302 was overcarbed from factory, they should've swapped the boss 9 with the 302 carb, and vice versa.

[@jimmychanbers2424]

Lmao. My half ton gmc pickup was out running them way back. Ford is junk

[@lapatriot9268]

Super nice stang! That sound... oh my.. that sound...

[@jerryscari7810]

my seven years old kid favourite hotwheels... fantastic car with real sound

[@marcmaz21]

Even Hemi’s didn’t like messing with these. Just an absolute monster.

[@02hreblue30]

on the street? you are completely HIGH. This car on the street was a dog. Hemi would easily dominate and I'm not a MOPAR guy

[@mitchanderson5813]

Chrysler hemi is a turd on the street as well. The boss was insanely choked down, tiny 735 Holley , boss 302 had a 780 for fuck sakes. The worst ex manifolds of any v8 muscle car, thanks to the shock towers. And a wimpy camshaft. Chrysler hemi had great manifolds and two carbs, and was still a mutt that often would lose to a shotgun. NOTHING will outrun a boss9 when it’s uncorked. I don’t care what brand.

[@mitchanderson5813]

Also, the cylinder head is made for a 500”+ engine, not a wimsy 429. Ford choked her so bad for no reason, they could have easily used the 3.85 crank and had a 460 boss. But chose not to.

[@jerrymiller4283]

Not true. The only thing outrunning these on the street were ls6 chevelles and barely. Stop lying.

[@shawnturbeville994]

I don't know what planet you guys are on but a stock Boss 429 wouldn't fall out of a tree. Potentially they could have been the baddest musclecar built. Ford castrated this motor. A 426 Hemi was finicky but in a sharp state of tune (fresh plugs, optimal timing, and with the carbs dialed in) they were bad to the bone. The hardware was there. The Boss had a bad combination of parts. To get it to run, you had to spend big bucks on what was already an expensive car. It was really unfortunate.

[@CallmeDaBreeze1971]

The Boss 429 and the Torino Talladega was a hell of a combination.

[@BTandKM111]

Righ!?!!!

[@TheGreatZantello]

Remind me of my 1973 Montego GT it was specially ordered with the smaller 429 with the T-10 4 speed and 9-inch rear end. It also was a NASCAR tag chassis that never made it to any track but found plenty of use on the streets of Detroit City. Sad but true I ended up trading it in for a minivan in the late 1980s for my ever-growing family I now had. I wonder where that car is today I understand it's worth a a small fortune now For its rarity alone. It would be cool as hell if I could sit in behind the wheel one last time before I pass on from this life. It was cherry red with black interior it had the Mach 1 style ram Air hood scoops on it from the factory and it was a fastback. 15 inch Magnum style chrome Wheels the same style that's on this Boss 429 mustang in this video.

[@timmotel5804]

Stunning. I always loved these cars. I was 17 when these cars came out. Thank You both for this wonderful demonstration of a rare classic muscle car.

[@corporalhollywood5392]

work of art, so beautiful. I sit in awe as the car jumps up from the torq

[@tootsie5052]

I'm a Chevy guy, but the'69 Mustang is my favorite Ford. A local guy that I kinda knew was a Mopar Hemi fanatic. He would buy every Hemi car he could find, swap the engine to a 383 or 440 and sell the car. He also bought a new Boss 429 Mustang, I'm not sure which year, and he took me and my friend for a ride and it was awesome. He didn't keep it long and it's the only Boss 429 I ever saw.

[@trillrifaxegrindor4411]

your friend was an idiot,priced hemi cars in the last 25 yrs?

[@MOST415]

The BOSS 429.. doesn’t, and will never get any better. A few years ago I read a story about one being found completely disassembled with only 11 original miles on the odometer. I never found a follow up story, but I can imagine that it’s sitting in someone’s showroom still wrapped in plastic with one hell of a story behind it.

[@Maverick8t88]

1969 Mustang isn’t just the most beautiful muscle car, not just the most beautiful Ford. It is, in my opinion, the single most beautiful car ever to come off any production line from any car company in the entire world. Add to it that big block rip and you’ve got an extremely desirable experience

[@trillrifaxegrindor4411]

71 hemi cuda,70 chevelle ss LS6 ,69 gto,69 AMX so many beauties

[@jimhuskey3343]

That is a sexy car and when you started it up damn and see it going down the street like that how cool wood that be to see that thing going down the street great video man

[@mlaechel]

Wow when that guy leaned on the gas, did you hear that sweet sound? Wow!

[@hhudler]

Brings back memories of my 69 428 CJ. Blew up the original motor and replaced it with an all aluminum 430 grand national. No body on the street ever came close to beating it. It was wearing a holley 1050 dominator and would get about 5 gallons to the mile with your foot on the floor. Top speed was about 147.

[@chadhaire1711]

bullshit

[@davehibbs9111]

Awesome car!! Thanks for sharing the memories I was around in the era of the 60'S and 70's...

[@kylevantassel7259]

I can tell owner is the real deal , he actually knew why the oil coolers went on and I see the trunk key left in the trunk.....

[@rocketsurgery1085]

what does the key in the trunk mean?

[@kylevantassel7259]

@@rocketsurgery1085 means you can't lose it 😁

[@waynegouin939]

Those Boss 429s are just badass. My dream car. Black too!

[@danmyers9372]

What a cool car you got to see and ride in! My first car (in 1973) was a 1970 Mach 1 351 and my best friend had a 1969 Mach 1 428 CJ. We both used to street race a little (who didn’t?) and I did a little bracket racing with mine. I say this only to show that I was around a lot of these cars back in the 1970’s and I can say that the car you rode in is not 100% stock. Specifically the exhaust is louder than stock and a bigger cam has been installed. The stock cam in the Boss 429 was very small (for the CI) and did not lope like this car does. The stock Boss 429 engines were notoriously weak torque wise (due to the too large intake ports and the tiny cam). Putting in a bigger cam really woke those engines up. Your noting that the car had a lot of torque is further evidence that a longer duration cam was installed in this car. I heard the owner say that Boss 429’s made “600 HP”. This is baloney. Perhaps a full race NASCAR Boss 429 made that kind of power but not the street version. They were under rated at 375 by perhaps 50 or so HP. Boss 429 engines really like to rev to take advantage of the huge intake ports. The owner of this car (understandably) kept the RPM’s way down. I doubt he ever went much over 4000 RPM..

[@davidthayer6969]

you are correct, in BONE STOCK configuration the B9 probably made LESS HP than the 428 CJ. It certainly was a full half second SLOWER than a 428 CJ which caused serious alarm at Ford but not enough alarm for them do put a better cam and carb on for 1970. The warranty department won the war. So you had an engine that had 700hp potential but in stock form would have barely put out 400.

[@robertshirley1192]

Yep, definitely not the factory cam BTW, when the owner made reference to 600 hp, he was referring to the engine in NASCAR trim.

[@ThePr8head]

THAT BEAST SOUNDS BADASS!!!!!

[@spamthese7221]

dayum... that is a symphony to my ears!

[@Soleprofit559]

My two dream cars 1967 Shelby gt 500 and 1969 boss 429. Such beautiful, classic and iconic cars

[@ediebartos]

Pat knows his stuff. Great car and video!

[@Slipmahoney21]

What an awesome car! I’ve got a black jade 69’ with a stroker 427. It’s only 450 horsepower and it is scary to get on, I can’t imagine a 429 with 600 horsepower!

[@dissrepair]

That sounds amazing too! Sounds like an awesome car

[@shawnturbeville994]

I can't imagine it either because a stock Boss 429 didn't even have close to the 450hp that your car has. It was lucky to have 375hp as advertised.

[@Twobarpsi]

One of my dream cars.

[@BobbyTucker]

I was told by a Ford Factory technician back then the Boss engine was rated at 375 h/p @ 6000 rpm for insurance purposes, the engine was Dyno'd at 540 h/p @ 5700 rpm.

[@davidthayer6969]

lol sorry you were told wrong, probably in the 340 range stock. It was so bad that the Boss 429 was slower than a 428 CJ. Because of this, Ford experimented with a kit that would let the boss be as fast as a 428 CJ. New cam, headers, carb........they decided against it, The engine obviously had massive potential but in stock form it was a de-tuned turd.

[@WildDiamond07]

The Boss 429 actually made 500+ HP in street trim.

[@Corkfish1]

I had a 69 mach I when i was a kid. I paid $1600 for it and it had a cobra jet with a shaker hood. I only wish i had kept it. I still think the 69 is one of the most beautiful cars ever built.

[@mitchblack7730]

I sold my 1970 428CJ RA 4-speed Mach 1 to buy my 1969 Boss 429 Mustang in 1977. Owned the car until 2002. The car I really wanted I had seen several months earlier - a 69 Boss 9 Wimbeldon White with around 7000 miles, but didn't have the cash to buy it then. The Boss was basically a race engine and Ford had tried to detune them for street use. Installing a better camshaft helped them run a lot better. The money now is in original condition cars and if I had one today, I would keep it or restore it to original condition. The Boss in this video does not sound like a stock original Boss. Noteworthy: I have seen Holman-Moody dyno graphs of Nascar prepped D-port Boss 9s pulling around 640 HP - about 40 more than the Nascar Chrysler Hemi.

[@dissrepair]

That’s awesome. It’s not entirely stock . It’s cammed and has a larger exhaust and carb. Runs way better when they are allowed to breath.

[@Madbootdestruction]

7:17 Keys left inserted on trunk 😮 Must have been lil excited for that test drive lol. FYI: She's a Beauty! ❤👍

[@qwicxs]

Great video drive it like you own it! Thank my favorite Mustang

[@drtb69]

My Dad bought a new one , put on custom exhaust system, off with the smog , a better Holley Carb, a dual point distributor and it approached 450+ hp. Fast as hell.

[@peterkay2406]

Man does that thing sound sic! I love it

[@76southernpride]

Where are you living!? That's some beautiful, yet planned out development. Beautiful but yet creepy living. The Stang is incredible

[@guysumpthin2974]

Looks like mustang city

[@Qweeds]

Made my eyes water when I heard that high rpm

[@jacquelinesannicolas9206]

I am drooling! This is my dream car 🚗

[@phoenixblack1220]

Honest to god amazing car and it sounds amazing! Lucky man!!

[@dreysgarage1159]

I hear muscle cars rev, I click like.

[@plumbs7199]

Who's the 17 that didn't like the vid ? Very nice car thanks for sharing such a rare special car !

[@imranibrahim9034]

Absolutely No Doubt.... Truly Deserve to be a BOSS........💋💋💋💋💋

[@kavinskysmith4094]

Its nice to hear one on full tilt from inside the car for once, normally its always outside the car

[@nickefgen9219]

Great video thank you, that's one of my favorite mustang's, love the color

[@kiketve2]

that car brought cool memories from the 70's miss those days in Venezuela

[@DavidSmith-ze2wi]

Those were the days fantastic car. I can only dream.

[@audieconrad8995]

What a freaking BEAST!! WHAH-HOOO!!

[@jcf8678]

That is the best video on a 1969 BOSS 429 on KZbin ! Respect 👍

[@Tommy1198S]

My Dad had one of these, loved it when he drove it in beast mode.

[@Tortuga6able]

I drove my 70 mustang daily for nine years. There was something about that car, it was special. It was mean, but so easy to control. Rev matching was smooth and seamless and oh with the sound that poured out of the pipes... Pure heaven. It was just a blast to drive, great memories. Best part of my youth by far. Second Mustang was a 68 California Special, it was very cool, but an Automatic, just not the same.

[@scottsigmon926]

Wow, what a great find. Definitely a great driver car with the fresh engine and new camshaft!!! Sounds like it should have!

[@misterdude6694]

9:33. Godamn son, that's how i like them, mean and clean. A pure car, with no electric assist, like esp, tcs and so on. that's what i call a real car.

[@philc4520]

Awesome - big badass & beautiful. Car is sick. Sounds wicked on full song. A true muscle car icon. Respect.

[@Nostrildomus]

I remember the bottom portion of the air cleaner had normally open air port doors . So that when you closed the ram-air scoop vacuum was over ridden and the warm air port doors opened . A very COOL Ford .

[@RSDX99]

It's funny the older we get the faster these cars were. I am almost 80 and I remember these cars running at E-Town in NJ. The factory-sponsored cars (Tasca Ford) were beating everybody but on the street, the sb Chevys would eat them up. I am a die-hard Ford guy but also a realist, the Boss 429's were never king of the street. The 428 CJ's were much quicker.

[@chrischalkley8571]

If Heaven has music it will sound like any Ford 429

[@sandyshoremann7524]

Wow, this would give my 1969 Fairline 500 428C a run that's for sure. But I only paid $780 - for the Cobra Jet back in 1978. Glad to have those memories, and they didn't cost arm and a leg! - Sandy

[@danwark991]

Thank You !! What a beauty

[@davidmarshall766]

Love the sound . I would like to see the car run with a nascar cam and bigger carb

[@billmcmeekin7909]

I got my license in 85. Grew up around all these muscle cars, but couldn't ever afford them. The availability of the best dwindled and prices for the rest increased immensely. Then Y2K came along and a new batch of muscle was reborn. Now have a Z06 and 2nd gen Boss 302, due to love of cars like this. Glory days :⁠-⁠)