Rarest Pontiac GTO Ever Produced
Few nameplates carry the weight of the Pontiac GTO. Widely credited as the car that invented the muscle car segment, it arrived as a performance-focused trim of the Le Mans before earning its own standalone identity for the 1966 model year — and it has commanded collector attention ever since. But within the GTO’s storied lineage, some variants are so scarce that most enthusiasts will never see one in the metal. We dug into the production records to find the rarest GTOs ever built.
Designed to take the fight primarily to the Ford Mustang, the GTO could be chosen with Pontiac’s mighty Ram Air series of engines in the ’60s. As the GTO model line had a limited run as a whole, some lesser-known model variants are incredibly rare. HotCars set out to find the most exclusive GTOs ever made in terms of pure production figures.
The 1970 Ram Air IV Convertible Is The Rarest Pontiac GTO Model
1970 Pontiac GTO Convertible Automatic
|
Engine |
 35 autotech Ram Air IV 400 ci V8 |
|
Power |
370 hp |
|
Torque |
445 lb-ft |
|
Units Produced |
13 |
(Sources: Pontiac, Drivin It Home)
The 1970 Pontiac GTO convertible equipped with the iconic Ram Air IV V8 engine and three-speed automatic transmission was the rarest of the standalone GTO models. Four different engines were available with the convertible GTO in 1970, with the standard 350 hp 400 ci unit serving as the entry-level option. Beyond this, the 400 ci Ram Air III and IV units — rated at 366 hp and 370 hp respectively — could be had, with the final choice being the 360 hp 455 ci powerplant.
The automatic Ram Air IV version of the 1970 convertible was by far the rarest of the quartet, with just 13 examples produced. Part of the reason it failed to capture the imagination of Pontiac customers at the time was almost certainly the Ram Air IV’s steep price of entry: it cost $558.20 more than the standard 400 ci unit, as per Hagerty — a substantial premium in period terms. The extra cost of the Ram Air IV was compounded by the fact that it didn’t feature air conditioning, making it more uncomfortable for many drivers during the summer months.
These elements likely contributed to the low interest in the car, with similar numbers also recorded by the 1969 version of the vehicle. Pontiac only made 14 of these, with the cheaper models selling considerably more in a similar pattern seen with the 1970 variant. The convertibles were available as standard GTO models or, for a premium, they could be had with the Judge package. Costing an extra $337, the Judge package consisted of a collection of body modifications that ensured it would stand out against the standard GTO.
The grille was blacked out, special The Judge decals and stripes were applied to the body, unique wheels, and even a unique I.D. for the vehicle set it apart. Cars with the Judge trim also featured a more aggressive front air dam and rear spoiler, completing the commanding look.
Pontiac Focused On Making The GTO A Full Package
Keen to ensure the GTO, which commands an insane amount of money on the collector market, could run with the best of them, Pontiac did its best to make the car as capable in the corners as it was on the straights. The first port of call was offering disc brakes as an option, though only for the front axle.
Disc braking systems were still in their relative infancy in terms of their use on road cars, hence their limited application on the GTO. Drum brakes came as standard, though the discs were a worthwhile upgrade for those who could afford them.
Pontiac’s engineers also went to work on the GTO’s chassis and suspension setup to make sure the car handled as dynamically as possible. Front and rear sway bars were included to increase body stiffness, while higher-rate coil springs and uprated shocks were introduced to help keep the car flat, even during high-speed cornering.
On the inside, Pontiac offered plush leather-finished bucket seats to provide a comfortable ride while cruising, along with the lateral support needed when the GTO’s driver decided to see whether the brochure was all just hot air. There were also a couple of different steering wheel options available, named Custom Sport or Formula.
The latter offered a sportier feel, making it easier to feed the steering when pushing. Power steering was also included as standard, as were a suite of rally gauges. One cool addition was the hood-mounted tachometer, which allowed drivers to keep their eyes on the road while monitoring engine revs.
The 1972 Pontiac GTO 455 HO Is The Rarest GTO Trim Ever
1972 Pontiac LeMans GTO HO Manual
|
Engine |
455 ci HO V8 |
|
Power |
355 hp |
|
Torque |
380 lb-ft |
|
Number Produced |
3 |
(Sources: Pontiac, Drivin It Home)
A particular model of the 1972 Pontiac LeMans GTO claims the prize for the rarest of its kind ever made. While not being a standalone GTO — the nameplate having been transformed into a package for the LeMans coupe for the 1972 model year — it still deserves to be singled out.
The version in question was the coupe variant equipped with the high-output 455 ci V8 and the four-speed manual transmission. Only ten of the HO 455 cars were built in 1972, with just three of them specified with the manual gearbox. The other seven were ordered with three-speed Hydra-Matic automatic units, according to production numbers provided by Year One-owned site Drivin’ It Home, which supplies muscle car parts for many vehicles of the era.
The HO 455 units produced a solid amount more power than the standard configuration, with 335 hp versus 325 hp. Torque was also up, with the HO making 380 lb-ft compared to the standard 455’s 355 lb-ft. The extra output came courtesy of a higher compression ratio: 8.4:1 in the HO versus 8.2:1 in the base engine.
The HO Version Of GTO Commanded A Significant Price Premium
Like the 1970 GTO convertible that came before it, the extra premium demanded by Pontiac to take delivery of the 1972 HO model may have worked against it. The hard top cost $3,287 at the time, though potential customers had to add on $101.50 and $180 for the HO engine and four-speed manual transmission respectively. That additional $281.50 represented a meaningful step up in price that likely gave many buyers pause.
The 1972 coupe version as a whole was immensely rare, with a total of 134 examples built. Alongside the ten HO 455s produced, a further five standard 455 cars were delivered to customers, all in automatic form. The rest of the run featured the 400 ci V8, with a near-equal split of 60 automatic and 59 manual cars emerging from Pontiac’s factory.
One thing is for sure: if any lucky muscle car enthusiasts ever set eyes on either of the models outlined here, they should savor the moment. A future opportunity to see them in person may not be forthcoming — unless you win the lottery, of course.
Sources: Pontiac, Hagerty, Drivin It Home, Mecum Auctions
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