Review and Breakdown: 1968 Plymouth GTX 426 Hemi Convertible

This 1968 Plymouth GTX convertible is one of 24 built, not 34, despite what the video’s own description claims elsewhere — and Mopar fans in the comments caught the contradiction. Under the hood, a 426 Hemi rated at 425 horsepower but built for NASCAR carries torque near 500 lb-ft, backed by a rear end reinforced specifically to survive it. One commenter even corrects the entire GTX-versus-Road-Runner origin story. So which details actually hold up?

A ’68 Plymouth GTX convertible pulls up, the host calls it one of just 24 built — and before the video even finishes making its rounds online, someone in the comments is pointing at the description and asking which number is actually correct: 24, or 34? That’s not the only thing longtime Mopar fans have opinions about here. One commenter takes real issue with calling the GTX a dressed-up Road Runner, laying out exactly why the timeline runs the opposite direction. Under the hood sits a 426 Hemi that Chrysler officially rated at 425 horsepower, a number this same video argues doesn’t come close to telling the full story. So which is it — banker’s hot rod, race-bred elephant motor, or something that depends entirely on which comment you trust?

1 of 24, Not 1 of 34 — The Rarity Claim That Actually Checks Out

Right at the top, this episode makes a specific rarity claim: this particular 1968 GTX convertible is one of just 24 built. It’s exactly the kind of number that gets scrutinized by an audience this well-versed in Mopar production figures, and sure enough, one commenter flags a discrepancy — the video’s own description elsewhere states 1 of 34, not 1 of 24, and asks pointedly which figure is actually correct. The records back it up: Plymouth built 36 Hemi GTX convertibles total for 1968, split 24 with the TorqueFlite automatic and 12 with the four-speed — and since this particular car runs the 727 TorqueFlite covered later in the video, 1 of 24 is exactly right for a numbers-matching automatic like this one. The 34 figure looks like the actual error, whether it’s a stray typo or old misinformation baked into one version of the description. Either way, it’s a good reminder that even well-researched car history videos aren’t immune to the occasional contradiction — and that a single digit really can be the difference between a documented number and an urban legend.

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Why the GTX Was Never Just a Dressed-Up Road Runner

One of the more substantive corrections in the comments pushes back directly on how the video frames the GTX’s origin story. Rather than a ‘dressed up Road Runner,’ as the framing might suggest to a casual viewer, one commenter lays out the actual sequence: the GTX arrived first, introduced for the 1967 model year (bowing in dealer showrooms that September) as a genuine performance version of the Belvedere, built with a 440 as standard equipment and the 426 Hemi available as an option — putting it above the Satellite and Belvedere in Plymouth’s lineup from the start. The Road Runner came later, launched in 1968 specifically as a low-cost performance option aimed at a younger buyer, built around a standard 383 with the Hemi optional rather than the reverse. Another commenter frames the GTX even more specifically as ‘a banker’s hot rod’ — a phrase that captures its actual market position perfectly: understated, well-equipped, and priced for a buyer who wanted serious performance without the Road Runner’s stripped-down, budget-conscious image.

425 Horsepower on Paper, NASCAR Underneath

The video’s own description doesn’t shy away from the gap between the 426 Hemi’s official rating and what the engine actually delivers. Rated at 425 horsepower, the Hemi’s real story is in how that power is produced: dual four-barrel carburetors, solid lifters, a cross-bolted block for added bottom-end rigidity, and combustion chambers the description compares to roughly the size of a softball. Torque figures cited put the engine over 400 lb-ft as low as 2,000 RPM, climbing toward nearly 500 lb-ft around 4,000 RPM — a wide, muscular curve that reflects the engine’s actual origins in NASCAR competition rather than street use. All of it routes through a Torqueflite 727 three-speed automatic, a transmission chosen specifically for its ability to handle that kind of torque without breaking. The takeaway from the video is straightforward: 425 horsepower was never meant to be read as a ceiling, and this engine spends its whole life proving it.

The Suspension and Rear End Built Specifically to Survive a Hemi

Putting a race-bred engine like the 426 Hemi into a mid-size convertible meant reinforcing nearly everything around it, and the video’s description goes into real detail on exactly what changed. Torsion bars and shocks were beefed up specifically for Hemi-equipped cars, and the rear leaf springs were fortified to handle the engine’s dramatically increased torque output without the axle hopping or the body flexing under hard acceleration. Behind all of that sits an 8-3/4 inch rear axle housing fitted with a locking differential and 3.23:1 gears, a combination chosen to balance off-the-line acceleration with reasonably civilized highway cruising. None of these changes are visible from a curbside glance, but together they’re the reason a Hemi GTX convertible could handle the kind of power its engine produced without the rest of the car falling apart around it — a genuinely engineered package, not just a big engine dropped into an unmodified mid-size body.

Black Stripes, Round Marker Lights, and a Grille Nobody Confuses With a Road Runner

Visually, the ’68 GTX carries a specific set of cues that separate it at a glance from lesser Belvederes and even from the Road Runner introduced the same year. Black GTX-specific stripes run across subtly creased and flared fenders, with a GTX badge marking the car and small round marker lights — new to the lineup for 1968 — adding a detail unique to this model year. The hood uses what the description calls a ‘side facing’ design with HEMI callouts positioned to be read from the side rather than head-on, paired with a blacked-out grille and full-width cast aluminum rear trim finished in argent silver with red reflectors. Two different commenters single out the round side marker lights and taillights specifically as a favorite detail of the ’68 model year, a level of praise that speaks to how much these small trim-year differences matter to collectors trying to date a car at a glance, long before checking a VIN or fender tag.

A Wood-Grained Interior With One Option Hemi Buyers Never Got

Inside, the GTX leans into the description’s ‘banker’s hot rod’ framing more than any exterior detail could. Thin, tailored bucket seats run alongside a full-length console topped by an automatic shifter finished with a ribbed chrome top plate, all set against wood-grained trim that gives the cabin a noticeably upscale feel for a car built around a race-derived engine. One commenter says they actually prefer the hardtop GTX with a cushy bench seat and four-speed manual over this convertible’s more overtly sporty bucket-seat layout — a reminder that even within GTX ownership circles, tastes split over just how track-focused versus boulevard-cruiser the car should feel. One option notably missing here: air conditioning was never offered on Hemi-equipped cars at all, this particular convertible making do with a basic AM radio and a power top instead, a small but real trade-off Hemi buyers accepted in exchange for the engine under the hood.

Dog Dish or Brady Bunch: The Hubcap Debate

Even with the rarity number in question and a correction issued on the GTX’s origin story, the comments circle back to genuine appreciation. One viewer calls it simply ‘a great video on one of the most desirable musclecars out there,’ specifically praising the burnout footage as a fitting way to demonstrate what the car can actually do rather than just describing it. Another gets pulled into a lighter debate entirely — arguing this convertible would have come with the full, dressed-up hubcaps resembling something off a Brady Bunch-era station wagon rather than plain steel dog-dish caps, a small styling detail that nonetheless matters to anyone trying to spot an incorrectly restored GTX. Between the production number question, the Road Runner correction, and the hubcap debate, this episode manages to generate the kind of detailed, engaged disagreement that only happens when an audience actually knows the subject well enough to argue about it.

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