1967 Shelby GT350 Hits The Dyno | How Much Power Will This Classic Mustang Make?

While LMR specializes in 1979-present Mustang parts, many of our employees are big fans of the classic Mustang. Scott Hubbard, LMR's lead mechanic, owns a couple himself. Today, we are dynoing his 1967 Shelby GT350 to see what type of power it makes.
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[@DrFerazza]

I love that its original and not some perfect trailer/garage queen. Imperfections are what make it so perfect.

[@brianspangler3771]

This is a driver's car and I love it. Those are impressive numbers for that little 289.

[@Burnedtoastify]

The RWHP dyno numbers might seem low to the uninformed but remember a 2006 Mustang GT only puts down about 260 as well. A 1991 5.0 puts down about 190. The stock 289 hi-po this car came with maybe put down 200. They don't call dynos "heartbreakers" for nothing.

[@joeklopp4842]

Well said.

[@joeklopp4842]

That's a really light car though. The weight to power ratio would probably be like a 400 plus HP car today.

[@hotrodray6802]

HIPOs weren't THAT weak..... Of course fully factory stock 500s of all versions (67-69) only put down @ 245 hp to the tires.... As per SHELBY himself during a magazine test of 4 cars back to back in early 90s. Shelby said... I told you so.

[@tiktokisanappforth0ttiesan995]

@65FASTBACKMAN what about 426 Hemi with 727 torqueflite would put down to the rwhp numbers?

[@tiktokisanappforth0ttiesan995]

@65FASTBACKMAN yeah thank you, i hope That's original 1960's 426 Hemi

[@bstfordchannel923]

I must say thats a REALLY nice ride is stock visual form. I am really impressed on how simple it is. And very cool looking being imperfectly PERFECT!

[@Chingon1]

Cylinder head technology has come a looong way. Either way, I bet this car was a beast in its day

[@Dthejewl]

I mean yeah but dodge owned the street lol with the 426 hemi

[@Texas_Road_Warrior]

@@Dthejewl 427 cammer... end of story

[@Dthejewl]

@@Texas_Road_Warrior how much hp did that make? Cause back in the day the 426 hemi was the fastest thing on the street

[@Rambone762]

@@Dthejewl Where's your Hemi 426?

[@Dthejewl]

@@Rambone762 I have a big block pinto I don't need hemi and I have a coyote

[@FiremanFrank24]

The power may seem low to modern Mustangs but dang, that is one nice car.

[@Lethal_Venom]

As much as I love my 2004 Terminator Cobra these older cars are still awesome

[@legendary351]

What an amazing car and like you said an honor to have such a great car in the shop

[@stevefowler2112]

I owned a K code '65 FB Mustang and me and my Dad rebuilt and blueprinted (we were both aerospace Engineers at the time, my dad has since passed) the hipo 289 and at that time I added the Shelby aluminum manifold, Holley carb (we used an upgraded 650 Double pumper with mech secondaries) and Tri-Y headers. Amazingly it pulled 307 H.P. on an engine dyno, almost exactly matching the Shelby advertised power of 306 H.P. That is the same engine that came in the '67 gt350 too.

[@latemodelrestoration]

That's awesome, Steve! Thanks for sharing that with us. -Landan

[@tycarter3123]

Yup

[@Dfour]

Full song with the dumps gave me goosebumps 🤘🏼

[@sclass4867]

I absolutely love this car I have a 67 fastback unfortunately LMR does not sell any 67 parts but I am putting a 302 5.0 V-8 engine in it and I get my parts only from LMR I am super excited to put a first GEN 5.0 in my 67

[@jacobbondy1767]

I got a 302 in my 1968 Mercury Cyclone it's a great engine im about to throw dual quads on it and I can't wait to see that does

[@thereissomecoolstuff]

Great job on the stats. Very detailed. Awesome

[@jackflash6377]

That was sweet. Thanks !

[@justin.c_svt]

Nice car Scott. The story is awesome too. Good job LMR

[@bustersgarage]

Thank God he did a doughnut and actually gave it a full send on the dyno! I LOVE the sound of these, but so many video clips are just people putting around and idling. I have loads of mechanical sympathy, but also believe a car shod be driven and enjoyed... Be good to your classics, but don't be too nice! :D

[@DrBeef216]

I remember an old Dyno run of THEEE 306hp 289 back in the day, and it had 223hp to the wheels. That would put it around 265 crank, and adjusting for the gross-to-net conversion, around 305 horse. Looks like Shelby wasn't bullshitting on the rating at the time. And regular k-codes put down around 195-200 wheel horsepower. Also coming out to around their rating.

[@tycarter3123]

Bingo! Perfect logic is spoken here. Thats exactly how I was schooled

[@jasonwheeler8996]

One of the best looking cars ever made!

[@FoxcastMedia]

Very cool car, and video!

[@latemodelrestoration]

One of our favorite classics here at the shop!

[@jimcallicoat]

Very cool car! I can understand taking the original engine out and preserving it good idea but if I was going to do that I would’ve replaced it with a stroke or 351 Cleveland.

[@Dfour]

That car is perfect 🤘🏼

[@bigblockford3059]

Damn!! that sounds mean. Love that cam shaft

[@emilioluna8189]

When your 3v only makes 40 more horsepower than 70s technology

[@awhitness]

maybe my favorite Mustang Thanks

[@BlueOvalTavern]

my guess pretty much nailed the initial dyno. But I gotta be honest... I totally underestimated how much the open carb and headers gained. I was honestly thinking it would pick up 5-10 hp lol.

[@pistolpete6321]

What a car!!

[@joncalon6014]

Fire content

[@joenobody2580]

Do you use the heart breaker or dream maker dyno ?

[@DONTHATETHEPLAYA321]

Finally!!!!!!

[@snowcrest7863]

Wow!!! Better than I expected. Stock '67 GT350 is 306 H.P (STP Gross Horsepower) -20% (SAE Net Horsepower)=245 H.P. then subtract 15% for manual transmission drivetrain loss = 208 H.P. to the rear wheels..........That's my guess, anyway.......

[@PatrickScottlxw]

We have max ported original j302 heads on a 393w in a foxbody 😆

[@TheKansasDude]

Those Flowmasters alone could be robbing like 10hp compared to a straight through muffler lol. Awesome car and a cool story.

[@byronhamilton6061]

Yeah I've got an 01 GT. Had Flowmaster 40s and an offroad X pipe on it.. then put headers and SLP loudmouths on it. Made a huge difference in how it ran. Has 3.73s in it. Im going to throw some comp cam 270s in it soon. It'll actually chirp through the gears and it's an auto

[@tomkjr1]

Super Shelby!

[@Dante-tt5bz]

Had no idea that without the air cleaner and exhaust these cars would make more power Time to take off that stuff off my 351 windsor lol

[@jacobbondy1767]

You can play around with different air cleaners some will rob power and others won't that's what im doing right now for my dual quad setup im about to put on my 302 trying to find the best air cleaner for it the one I have will definitely rob some power

[@Dante-tt5bz]

@@jacobbondy1767 I have the k&n purple one

[@jacobbondy1767]

@@Dante-tt5bz do some research online go on the forms and watch some videos to find the best air cleaner i know typically the air cleaners that feed the air straight down the carb are better so im looking for some for my dual quads

[@kerryhoward804]

Y'all Texas boys don't play around!!!

[@Tegridynews]

Around 340hp at the crank. Nice

[@gonerydin4225]

I feel better about my Tacoma 3.5l V6 now.

[@tycarter3123]

Mmmm.............. My 1989 5.0 GT had AFR heads (165's) and a custom cut cam it made 324 hp at the rear wheels. Long tubes headers w/ cats for mufflers exited under the doors (natural aspirated) hate nitros. This GT350 must have a hydraulic cam . If that 67 was mine it do the same numbers as my 89 5.0. I betcha.

[@Khalidsvt101]

sound and look is enough for me beautiful ☺️

[@216AmateurHours]

Not bad for a 289

[@redwalsh87]

Oof Flowmasters robbing some horses. Cool car and good numbers for only a 302. Find a GT-500 with a 429 in it next!

[@brianspangler3771]

I think he said it was a 289.

[@MoctezumasRevenge1]

The 9" robs more than the muffler

[@brianspangler3771]

@@MoctezumasRevenge1 That and the driveshaft, I'm gonna assume its steel so you know its robbing some power as well.

[@redwalsh87]

@@brianspangler3771 you're right he did, sorry had a flashback from my foxbody days lol

[@brianspangler3771]

@@redwalsh87 I know what you mean. Lol.

[@codycastillo5082]

Makes more than my new edge 😢😭

[@Lethal_Venom]

2v ?

[@codycastillo5082]

@@Lethal_Venom yessir 😂

[@Lethal_Venom]

@@codycastillo5082 can always throw a little boost at it, will handle some as long as you don’t over do it

[@codycastillo5082]

Been in my mind, but I got a clean 04 torch red convertible excellent condition only 83,000 on dash. I probably end up getting it once I’m done with my deployment 🙏

[@Lethal_Venom]

@@codycastillo5082 oh very nice. A lot of people hate on the 2v’s in favor of the 4v but they are nice overall. I do love my Cobra though lol. Thanks for your service!!

[@TheFastStang]

I expected way more...

[@CPAJayhawk]

Probably a mid 13 second car at that power, not sure how much it weighs

[@mpilksjr]

269 / 276

[@1SirCarlton]

Why post numbers? People are still gonna watch the video.. 🤷🏿‍♂️

[@mpilksjr]

@@1SirCarlton thanks

[@joelewing4498]

Wonder what the flywheel horsepower would be...approx. anyway? Any ideas? I had 4 years of Auto Mechanics Class in high school 1969 thru 1973. Man....that looks OLD when I type it. Oh well. My folks had (2) Ford 289 2bbl engines (rated 200 horse) in our family cars, and I overhauled the station wagon's motor (1966 Ranch Wagon) my senior year. I can still remember those relatively TINY ports in the heads. Back then the Chev 283 and 327's were just whomping ass on the poor little Ford 289's. I always wondered why such a big gap in performance between the 2....until tearing into Mom's 289. It HAD to be the lousy breathing and small valves...along with the cam profiles too. Evidently the bigger heads in this video's Mustang, as well as cam change....made all the difference. GREAT VIDEO! I'm subbed. joel in arizona

[@timhuggins7069]

In 1982 I had the opportunity to buy my buddy's 67 shelby GT 350 for $1500,00. To this day I can't say why I didn't buy it. One of the dumbest decisions i've ever made. I guess I'm not the smartest tool in the box or the brightest light bulb. Whatever cliche fits.smh

[@dwightchaos9449]

In the 90s high school I coulda bought a 73 if I remember right Dodge Challenger for 1,500 bucks.. kid had a supercharger/ small blower on it. I kick myself to this day I didn’t get it.

[@Dthejewl]

Dont get me wrong im a Ford guy till i die but this is why Dodge was the king of the street in the 60s and 70s the 426 Hemi made 420 hp (so dodge said) but it actually made on a chassis dyno in a challenger stock at 465hp dodge definitely lied about the numbers lol. But i mean only making 260hp out a v8 is kinda pathetic in my opinion if if had some better cylinder heads cam and a better flowing port matched intake it would make a world of difference

[@jacobbondy1767]

Maybe compare the Boss 429 to the 426 hemi to make it fair both are big blocks, both were advertised around the same power and both were close to being the same size the 429 was only 3 cubic inches bigger instead of comparing a 426 hemi to a 289 small block that just isn't fair

[@midnight347]

Its 289 cubes being compared to 426 cubes. Need i say more lol. For the old school setup it has and to be fairly mild these numbers aren't bad at all. The 9 inch and big heavy driveshaft don't help on the dyno. Ford did just fine in the 60s and they're still doing just fine today. They were rated different back in the day they were rated gross power meaning no accessories no exhaust straight headers and open carb etc. NOT the way they were sold to the public in cars. Put a big bad stock 60s 426 on the dyno while its in a car running all accessories and full exhaust and prepare to be disappointed. It won't make anywhere near 400+ in bone stock form. The quickest cars back then stock ran like high 13s at like 105 mph I seen a show where they tested alot of the best muscle cars from way back all stock. They weren't nearly as quick as everyone's old fish stories they tell lol. But then again high 13 at 105 in one of those death traps would feel pretty fast.

[@svt_kc13b76]

RHEC

[@hotrodray6802]

You did NOT remove the TAIL PIPES, you removed the complete exhaust from the header collectors = open headers! 🙄🙄🙄🙄

[@socleanmx6]

My guess 256 hp 244 lbs!!!!!!

[@idontlikecops1]

He was spoiled. 4k in 1980 was big money

[@hubstang]

Scott Hubbard Here...I was " Blessed " with a great Father who invested in his son. My first job in 1977 at age 13 at the gokart shop and the job at U-Haul from age 14-18 paid for my 1967 GT Mustang.. $450 and set me up to pay off the $120 a month for 3 years payment on the 1981 loan for this Shelby. !n 1982 I began working at a Mustang Restoration Shop. and so on...I bought and paid for my cars. BUT, Yes with ALL thanks to a great Dad.

[@dkramerstein]

Bwahahahahahahahaha

[@johnmoriarty6158]

It seems low because it is low.

[@midnight347]

It isn't low for a mild 289 from the 60s. You guys kill me with your huge power expectations for everything nowadays.

[@johnmoriarty6158]

@@midnight347 It's very resectable for the parts.