This 825-HP Viper-Swapped Jeep Cherokee Is on Bring a Trailer, and Its Engine Has a Dark SecretA 1979 Jeep Cherokee Chief with a 9.0-liter Viper V10 stuffed under the hood is the kind of build that stops you mid-scroll. It looks like a clean vintage two-door SUV from the late 1970s. Then you find out it makes 825 horsepower, runs a six-speed manual, and already seized its engine once before it ever hit the auction block. That last part is the detail nobody expected, and it is sitting right there in the listing.The truck is currently live on Bring a Trailer, and bidding has already pushed well into six-figure territory with the sale set to end on June 18. For a restomod Jeep, that's serious money. For a restomod Jeep with a documented engine failure in its history, it's the kind of number that makes you read the fine print twice.A Jeep That Hides A Supercar UnderneathAt a glance, the Cherokee still reads as pure vintage Jeep. The boxy proportions, the tribal-style graphics, and the chunky stance all hold onto the rugged personality of Jeep's late-1970s SJ platform. Nothing about the silhouette screams supercar. That's part of the appeal here, because what's hiding under the sheet metal has almost nothing to do with what AMC-era engineers ever imagined.AdvertisementAdvertisementThe build came from Vigilante 4x4, a Texas company that has made a name building some of the most extreme custom Jeeps you'll find anywhere. They stripped the body to bare metal before refinishing it in Aston Martin Stratus White and Frosted Glass Blue, then added retro-inspired 1975-style graphics down the sides. It rolls on custom 17-inch Vigilante billet aluminum wheels wrapped in BFGoodrich All-Terrain KO2 tires, so it still looks ready to leave the pavement if asked.Here's the part that matters. The centerpiece is a naturally aspirated 9.0-liter Prefix-built Viper Gen-V V10, and it reportedly makes 825 horsepower and 750 pound-feet of torque. A naturally aspirated Viper engine is an unusual choice even in a restomod world that has seen just about everything. It turns a classic family SUV into something that would embarrass a lot of modern sports cars in a straight line.Built Right, Top To BottomThis isn't a case of dropping a big engine in and calling it a day. Power runs through a Tremec TR-6060 six-speed manual paired with an Advance Adapters Atlas II transfer case. That setup feeds a Dana 44 front axle and a Dana 60 rear axle from Currie Enterprises, giving the Cherokee real hardware for both road and dirt. A stainless steel dual exhaust with four Borla mufflers makes sure the V10 sounds as loud as it looks.Underneath, a custom Roadster Shop chassis carries a triangulated four-link rear suspension with Fox dampers and Eibach springs. Stopping is handled by hydroboost-assisted Baer six-piston brakes at all four corners, and a Borgeson quick-ratio steering box sharpens up the way it drives. These are the kinds of components that separate a thoughtful build from a flashy one, and this Jeep clearly went the thoughtful route.AdvertisementAdvertisementThe interior leans into nostalgia in the best way. The front buckets and rear bench mix blue Levi's-style denim upholstery with leather accents, a direct nod to the AMC-era special editions that ran denim interiors back in the 1970s. Modern touches sneak in without ruining the vibe, including power windows, Vintage Air climate control, Bluetooth audio, and a JL Audio system with an amp and subwoofer. Dynamat insulation and Wilwood pedal hardware round it out, giving the cabin a more refined feel than most vintage 4x4s ever had.The Twist Buyers Cannot IgnoreAnd that's where it gets complicated. The seller says the Jeep was first refurbished back in the 1990s before getting the full Vigilante transformation, which wrapped up in September 2024. The odometer shows about 3,200 miles since completion, so this is a fresh build with very little use.But the listing also discloses something a lot of sellers would rather bury. Shortly after the build was finished, an oil line separated while the truck was idling at Prefix's Detroit facility, and the engine seized. According to the owner, Prefix tore the engine down, inspected the components, replaced the bearings, and rebuilt the unit before testing it again. So the headline number of 825 horsepower comes attached to an engine that has already been apart once.That detail matters because it puts the bidder in a real spot. A naturally aspirated Viper V10 is rare, expensive, and not something your local shop can fix on a Tuesday. A rebuild done by the people who built it is about the best outcome you could hope for after a failure like that, but it's still a failure that happened before the truck had any miles on it. Buyers chasing this Cherokee into six figures are betting that a fresh rebuild on a one-off engine holds up. That's the gamble baked into one of the wildest Jeeps to hit Bring a Trailer in a long time, and the clock runs out on June 18.Source
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