Buick Made the Torquiest Muscle Car of 1970 — Then Buried It Under a Quiet Badge and an Automatic

Only about 3,097 Buicks got the 455 Stage 1 engine in 1970, and its 510 lb-ft of torque beat every Hemi and LS6 on the street. So why does nobody count it? The answer is sitting in a Chicago driveway, painted gold, with an automatic behind it.

Ask a room full of muscle car people to name the torquiest machine of 1970 and you will hear Hemi, you will hear LS6, you might hear 440 Six Pack. You will almost never hear Buick. Yet the number that ended the argument that year was printed on a Buick spec sheet: 510 pound-feet, more than the LS6 Chevelle’s 500, more than the 426 Hemi, more than anything else wearing a muscle car badge in North America. The car that carried it, the 1970 GS 455 Stage 1, refused to advertise the fact. It arrived with a quiet cabin, a torque converter, and a badge most buyers associated with their father’s sedan, and half a century later it is still the car that gets left off the list.

The Ride That Cost Joe Saladino Three Buicks

On October 10, 2022, in the west suburbs of Chicago, Lou Costabile pointed a camera at a gold 1970 Buick GS Gran Sport 455 Stage 1 and let its owner do the talking. The owner is Joe Saladino, and by his own account this is not his first Stage 1, or his second. It is his third. The hook was set decades earlier, when a friend took him for a ride in one as a young man and he decided, more or less on the spot, that this was the car for him. He has owned this particular example since 2017.

That detail matters more than it looks. Buick did not sell the Stage 1 on a magazine cover or a drag strip poster. It sold it the way Joe bought into it, one passenger seat at a time, to people who felt what the engine did off idle and never quite recovered. The car in the video is finished in factory gold over a black interior with a Turbo Hydra-Matic behind the 455, which, as you will see in a moment, is the single most representative configuration this car ever came in.

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What Lou Costabile Found in a Chicago Driveway

Costabile’s “My Car Story” format is deliberately unglamorous. There is no studio, no drone, no script. There is a car parked outside, an owner who knows it, and a walkaround that takes its time on the details most videos skip: the paint under direct sun, the engine bay, the interior, and then a ride. For a car like the Stage 1, that format does more work than a spec recital would, because the entire argument for this Buick is sensory. You cannot photograph 510 pound-feet. You can hear what it does to an exhaust note at idle, and you can watch what happens to the rear tires when the driver leans on it.

Viewers who have watched the clip keep circling the same two things. The first is the idle, which several longtime followers of the channel called the best-sounding car they had heard on the show, and which regulars noted has been helped along by a camshaft the owner installed rather than a factory-issue part. The second is the low-end shove. Comment after comment comes from people who rode in one, owned one, or watched a friend’s Stage 1 leave two black stripes down a suburban street, and every one of those memories starts at low rpm rather than at redline. That is not nostalgia inflating the record. That is the engine doing precisely the thing Buick engineered it to do.

The Year General Motors Finally Let Everyone Off the Leash

To understand why the 1970 Stage 1 exists at all, you have to understand what GM had been doing to its own divisions for most of the decade. Corporate policy capped intermediate-sized cars at 400 cubic inches, a rule that kept Buick, Oldsmobile, and Pontiac fighting the displacement war with one hand tied behind their backs while Chrysler dropped 440s and Hemis into anything with a frame. For the 1970 model year, GM lifted the cap. What followed was the single most concentrated burst of factory performance the company ever produced.

Chevrolet answered with the 454 in the Chevelle SS, including the 450-horsepower LS6. Oldsmobile finally put a 455 into the 442 without needing Hurst to do it as an end run. Pontiac put a 455 in the GTO. And Buick bored its existing 400 out by 55 cubic inches and dropped the result into the Gran Sport. Every division showed up. The difference is that three of them built a reputation on it and the fourth built a car so composed that people mistook composure for a lack of speed.

510 Pound-Feet and a Ten-Horsepower Understatement

Here is the spec sheet, and here is where it gets strange. The standard GS 455 was rated at 350 gross horsepower. The Stage 1 was rated at 360. Ten horsepower. That is the entire advertised gain for a package that added larger valves, higher compression, a more aggressive camshaft, and revised carburetion and ignition calibration. Nobody who has driven both believes ten horsepower covers the difference, and Buick people have circulated stories for decades about production-line dyno numbers running well north of the published figure. Those stories are recollection rather than documentation, so treat them as folklore with a good track record rather than as fact.

The torque figure, though, is not in dispute and never needed defending: 510 pound-feet, delivered low in the rev range, in a car that weighed roughly 3,800 pounds. Motor Trend put a Stage 1 through the quarter mile for its January 1970 issue and recorded 13.38 seconds at 105.5 mph, a result that put it in genuinely elite company for a showroom-stock American car in 1970. Most Stage 1 cars left the factory with a Turbo Hydra-Matic 400 and a 3.64:1 posi rear end, a combination chosen less for drag racing than for making all that low-end torque usable on a street where you are not always in the mood to row a gearbox.

Why 1,785 Automatics Explain the Whole Car

The production numbers are the most revealing thing about the 1970 Stage 1, and almost nobody quotes them. Buick built 2,465 Stage 1 hardtops that year, plus 232 convertibles, plus 400 GSX units fitted with the engine, for roughly 3,097 cars in total. Break the hardtops down and the picture sharpens considerably: 16 left with a three-speed manual, 664 with a four-speed, and 1,785 with the Turbo Hydra-Matic 400 automatic.

Read that again. More than seven out of ten Stage 1 hardtops were automatics. In an era when a four-speed was practically the uniform of the American performance car, Buick’s quickest machine was overwhelmingly ordered as a two-pedal car, and Buick was entirely fine with that. This was a division whose customer expected a car to be quiet, well trimmed, and adult. Buick did not fight that identity when it built the Stage 1. It leaned into it, and produced something genuinely unusual: a muscle car engineered for people who had already outgrown the need to prove anything at a stoplight, but who still very much wanted to win one.

That is the reason the Stage 1 is missing from the popular canon. It never generated the mythology, because mythology requires noise, and this car’s whole design brief was to deliver the performance without the theater. The Hemi got a nickname. The LS6 got a number people memorized. The Stage 1 got a discreet badge and a customer base that mostly kept it to themselves. Scarcity did the rest: with roughly 3,097 built across all body styles, a correct, numbers-matching example is a genuinely rare object today, and the market has spent the last two decades quietly figuring that out.

The Sound Is What Nobody Forgets

What comes through most clearly in the reaction to Costabile’s video is not the spec sheet. It is that this car imprints on people. One viewer described his father bringing a brand-new one home on a Friday night in 1970, backing it into the street the next morning, power-braking it, and vaporizing both rear tires for roughly sixty feet before lifting. Another owned a GS 350 for more than a decade in the 1980s and said watching this one drive brought the whole thing back, glasspacks and all. A third pointed out that a friend ran a Stage 1 for over forty years and described it not as a race car but as a tight, quiet, solid personal luxury car that happened to be violently fast.

That is the Stage 1’s real legacy, and it is the reason a car this quick spent fifty years being described as underrated. It was never underrated by the people who drove one. It was underrated by everyone else, because Buick built the fastest thing in its lineup and then declined to make a scene about it. Joe Saladino has bought three of them. After watching what this one does when the throttle opens, that starts to look less like collecting and more like a reasonable response.

Watch the full video above and let us know your thoughts in the comments.