Dodge Dart Pro Street 605CID Hemi Big Block 1968 images

This 1968 Dodge Dart tribute build packs a 605-cubic-inch Hemi big block under a functional hood scoop, riding on a tubbed rear end built to handle far more power than Dodge’s original 80-unit Hemi Dart ever put down. Painted bright red with a chrome-and-polish engine bay to match, it channels the spirit of Dodge’s most notorious factory drag car. Read on to find out what actually separates this tribute from the real thing.

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This 1968 Dodge Dart has been highly modified, top to bottom, and now is powered by a huge 605 CID (9.91-liter) Hemi big block which puts out 836.8 hp (624 kW) and delivers 752 lb-ft (1,019.58 Nm) of torque to the wheels. There is no radio though — the exhaust rumble is all you will need to hear. MCF thanks Gateway Classic Cars for the images displayed here.

The 80 Factory Cars That Started It All

Back in 1968, Dodge built exactly 80 Darts so extreme that the factory refused to warranty them, dropping a raw 426 Hemi race engine into a compact economy car body just to dominate the drag strip for one season. This car isn’t one of those 80 — it’s something stranger: a modern tribute that takes that same reckless idea and multiplies it, stuffing a 605-cubic-inch Hemi big block under the hood of a Dart that was never meant to carry anything close to that kind of power. The build style has a name — Pro Street — and it comes with its own unwritten rulebook about tubbed rear ends, narrowed axles, and wheelie bars borrowed straight from real drag cars. What survives from that original 1968 factory experiment, and what’s pure fantasy bolted onto a 1968 shell?

On February 20, 1968, an Economy Car Learned to Race

On February 20, 1968, Dodge released a limited option coded LO23 — the Hemi Dart — assembled by Hurst Performance. Rather than the milder Street Hemi, it used the raw, cross-ram 426-cubic-inch race engine with no factory warranty, built specifically for drag racing. Period reports credited these cars with reaching 130 mph in under 11 seconds and running the quarter mile in the 10-11 second range, with some accounts claiming times as low as 9-10 seconds.

What ‘Pro Street’ Actually Means Under the Skin

Pro Street emerged as a popular custom car style in the 1980s, built to imitate the look of a Pro Stock race car while staying street legal with a full interior. A genuine Pro Street build typically combines at least two of three signature modifications: a heavily built V-8, a narrowed and tubbed rear axle wearing oversized tires with wheelie bars, and a roll cage. This tribute Dart channels the same defiant spirit that made the original Hemi Dart notorious, just dialed up with a 605-cubic-inch Hemi big block that dwarfs anything Hurst ever bolted into a factory car.

What the Photos Show

This Dart wears bright red paint over a two-tone tan and black interior, with a functional, forward-facing hood scoop feeding cool air directly into the engine and a low, aggressive stance that gives away the build before the hood ever opens — a narrow front track paired with dramatically flared, tubbed rear fenders housing wide drag-style tires. Under the hood, the big Hemi is dressed in polished chrome valve covers and a large round air filter sitting atop the carburetor, with the inner fenders finished in white to set off the red bodywork rather than hide it. Nothing about the presentation is subtle, and it isn’t meant to be.

A Compact Car Never Built to Carry This Much Power

The standard 1968 Dart, whatever the trim, was engineered around Chrysler’s small-block and slant-six engines, not a raw big-block Hemi — which is exactly why a build like this requires so much structural rework to survive. Builders taking on a project like this typically reinforce the frame rails and subframe connectors before the engine ever goes in, since a stock unibody Dart chassis was never designed to handle anywhere near this kind of torque without flexing or cracking under hard acceleration. It’s a reminder that a Pro Street build is as much a chassis engineering exercise as it is an engine swap.

Why Builders Keep Choosing the Dart Over Bigger Mopars

Compared to a Charger or a Road Runner, the compact Dart offers a lighter body shell and a smaller footprint, both of which appeal to builders chasing an aggressive power-to-weight ratio rather than factory-correct presentation. The tradeoff is exactly what makes a build like this so dramatic to look at: a car that was never meant to carry big-block power at all, visibly straining against fender flares and a hood scoop that had no place on the factory options list. That contrast between the car’s economy-minded origins and its current output is the entire appeal for builders who take on a project like this.

Keeping a Car Like This Running

A tribute build making close to 840 horsepower demands upkeep well beyond what a stock Dart ever needed. Owners of comparable Pro Street Mopars typically run upgraded fuel systems, aftermarket ignition components matched to the engine’s compression, and drag-radial rear tires that wear far faster than anything the factory ever specified for a compact car. None of that discourages the builders who take on projects like this — the appeal of a Dart this radically transformed has always been about proving what’s possible, not about practicality.

The Legend That Outgrew the Actual Cars

Part of why tribute builds like this one keep getting made is that the original 1968 Hemi Dart has become almost mythical among Mopar collectors — so few survive, and so few ever come up for sale, that most enthusiasts will only ever see one through photographs or at a major show. A tribute built decades later, wearing a much larger engine than Hurst ever installed, gives builders and spectators alike a way to experience something close to that factory legend without competing for one of the handful of genuine survivors. It’s an homage more than a recreation, and most builders in this space are upfront about that distinction rather than trying to pass a tribute off as the genuine article.

Whether you see it as a tribute done right or a step too far past the original recipe, this Dart makes its case the moment the big Hemi fires up. Share your thoughts in the comments below.

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