Chevrolet Hid Its Most Brutal 1970 Engine in a Truck Bed – The El Camino SS 454 Ran With the Fastest Muscle Cars in America

A 1970 Chevrolet El Camino could be ordered with the same 450-horsepower LS6 454 as the Chevelle SS – an option so rarely chosen that surviving examples are now among the most overlooked muscle vehicles from Detroit’s biggest year.

Chevrolet spent 1970 building the angriest big-block it ever put a factory warranty on, and the company’s own marketing department seemed almost embarrassed by where else it ended up. Everyone expects the LS6 454 in a Chevelle SS — that’s the car on the posters. Almost nobody expects to find the same engine bolted into a pickup bed. But for one model year, Chevrolet let buyers order a 1970 El Camino SS with the identical 450-horsepower LS6, and the result was a truck that could run quarter-mile times most sports cars of the era couldn’t touch. It sold in tiny numbers, it’s barely remembered next to its Chevelle twin, and it’s exactly the kind of car this video exists to resurrect.

The Truck That Borrowed Chevrolet’s Angriest Engine

The featured video, “Car Facts You Don’t Know: 1970 El Camino SS 454 (LS6),” walks through five facts about a vehicle its own creators admit gets dismissed on sight. “The 1970 El Camino SS 454 may look like a truck, but under its hood lies one of the most powerful factory engines of its era,” the description reads, and the video backs that up with the engine’s shared DNA with the Chevelle, its exclusivity as an LS6 host, and how few examples left the factory configured this way. The channel frames it bluntly: think muscle cars don’t belong in a truck bed? Think again.

That framing matters because the El Camino had spent most of the 1960s as a curiosity — half car, half pickup, aimed at buyers who wanted hauling capacity without giving up a Chevrolet dealership’s badge. By 1968 it had been reborn on the Chevelle platform, sharing sheet metal, chassis, and increasingly, engine options with Chevrolet’s flagship muscle car. The 1970 model year pushed that shared parts bin to its absolute limit, and the LS6 option sat at the top of it.

⚑ Featured Gear

Start Car Conversations →

As an Amazon Associate I earn from qualifying purchases.

Why the LS6 Almost Never Made It Into a Pickup Bed

The LS6 454 wasn’t a mild big-block. It used a solid-lifter camshaft, forged-aluminum pistons, a high-rise intake, and an 800-cfm Holley carburetor — hardware aimed squarely at drag strips, not grocery runs. Chevrolet rated it at an advertised 450 horsepower at 5,600 rpm and 500 lb-ft of torque at 3,600 rpm, figures that made it, on paper, the most powerful engine General Motors offered that year. Those numbers applied whether the LS6 sat under a Chevelle’s hood or an El Camino’s, because mechanically they were the same engine.

The twist is that Chevrolet never advertised the El Camino as a performance flagship the way it did the Chevelle SS. The truck’s utility image worked against it in the muscle car marketing wars, which is likely why so few buyers specified the LS6 when ordering one. Most El Camino SS buyers that year checked the box for the milder 400-horsepower SS 396 (actually a 402-cubic-inch engine by then) or the standard 454, not the race-bred LS6. The option existed, dealers could order it, but almost nobody did — and that’s precisely why surviving examples are treated as near-mythical today among El Camino collectors.

The Rival Chevrolet Was Really Answering

None of this happened in a vacuum. Ford had its own coupe utility, the Ranchero, built on the midsize Torino platform and available with Ford’s own big-block Cobra Jet power by 1970. Chevrolet’s engineers knew exactly what they were up against, and the LS6 El Camino reads as a direct answer to Ford’s willingness to put serious horsepower into a vehicle with a cargo bed. The two trucks rarely get cross-shopped by modern collectors the way Mustangs and Camaros do, but in 1970 they were fighting for the same small slice of buyers who wanted both a work vehicle and something that could embarrass a sports car at a stoplight.

That rivalry explains why Chevrolet bothered homologating the LS6 for the El Camino at all. The engine didn’t need to go in a truck to prove a point about the Chevelle’s performance — the Chevelle already did that on its own. Putting it in the El Camino was about not ceding an entire market segment to Ford, even if the volume of buyers who actually wanted it stayed tiny. It’s a decision that looks almost quaint from a modern vantage point, when half-ton pickups with supercharged V8s are a mainstream product category rather than a rumor between two Detroit engineering departments.

450 Horsepower, 500 Lb-Ft, and a Rumor That Never Quite Died

Chevrolet’s official LS6 rating of 450 horsepower was aggressive for 1970, but period enthusiasts and some later historians have long argued the real figure was higher — closer to 500 horsepower on an engine dynamometer — and that Chevrolet held the published number down to keep insurance premiums and corporate liability in check. That theory has never been proven with factory paperwork, and it should be treated as an enduring rumor rather than a confirmed fact. What isn’t in dispute is the car’s real-world performance: contemporary tests of LS6-powered Chevelles and El Caminos consistently landed in the low-to-mid 13-second quarter-mile range, with trap speeds pushing past 100 mph — numbers that embarrassed plenty of cars without a truck bed hanging off the back.

That performance came packaged with genuine utility. A 1970 El Camino SS 454 could still haul a load, still carry four feet of cargo behind the cab, and still look like the kind of vehicle a contractor might drive to a job site. Few buyers connected those two ideas — hauling capability and a 13-second quarter-mile — and that disconnect is a large part of why the LS6 El Camino still catches people off guard more than fifty years later.

Styling played a role in the confusion, too. The 1970 El Camino SS wore the same twin-nostril hood, blacked-out grille, and SS badging as its Chevelle sibling, along with the option for the same cowl-induction hood that fed cold air directly to the carburetor. From the windshield forward, a loaded El Camino SS 454 looked nearly identical to a Chevelle SS 454 — the giveaway was only the open bed behind the cab. Chevrolet wasn’t hiding the performance intent; buyers simply weren’t primed to look for it on a truck, and dealers rarely pushed the connection in showroom conversations the way they pushed Chevelle sales.

How Rare Is Rare? The El Camino LS6’s Murky Numbers

Total 1970 El Camino production across every engine and trim level ran into the tens of thousands, but the LS6-specific count is far murkier. Chevrolet’s own records from the period didn’t always break the LS6 option out separately from other 454 installations, and much of what collectors cite today traces back to enthusiast research and dealer invoice archives rather than a single definitive factory tally. What’s consistently agreed upon is that the LS6 El Camino was offered for only that one model year before Chevrolet discontinued the option, making it one of the shortest-lived high-performance packages the El Camino ever received.

That brief window is also why so few turn up at auctions today compared with LS6 Chevelles, which Chevrolet marketed far more aggressively and which collectors have spent decades specifically hunting down. The El Camino version slipped through largely unnoticed by buyers at the time, which means fewer were ordered, fewer were preserved, and fewer still carry fully documented build sheets proving the engine was factory-installed rather than swapped in later.

What Makes the LS6 El Camino Worth a Second Look

Part of what makes this car compelling isn’t just the spec sheet — it’s the mismatch between expectation and reality. A buyer cross-shopping muscle cars in 1970 wasn’t supposed to end up at a Chevrolet truck. The El Camino occupied its own category, caught between the Chevelle’s performance image and the practicality of a light-duty hauler, and the LS6 option briefly made it one of the fastest vehicles Chevrolet sold with a cargo bed. It’s a footnote in most muscle car histories, mentioned almost as an aside next to the Chevelle SS 454, but it represents the same engineering team pushing the same engine into a body style nobody expected to carry it.

For collectors today, that obscurity cuts both ways. Documented, numbers-matching LS6 El Caminos command serious money when they surface, precisely because so few people were looking for them decades ago when they were simply used trucks. The ones that survived often did so by accident — kept running as work vehicles long after their Chevelle siblings had been retired to garages and car shows.

That survival story is also a cautionary one for anyone shopping the market today. Because the LS6 El Camino was rarely treated as special when new, some surviving trucks have murky engine histories — a 454 under the hood today isn’t automatic proof that it’s the original, numbers-matching LS6 the car left the factory with. Verifying a build sheet, cowl tag, and casting numbers against GM’s documentation matters more on this car than on almost any Chevelle, precisely because so few people were keeping careful records on El Caminos in period. For serious buyers, that verification step isn’t optional — it’s the difference between owning a genuine piece of this story and owning a well-built tribute to one.

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