Believe it or not, but it was all the way back in September, 2016 when Fiat Chrysler first pulled the wraps off of the Hellcat-powered Ram 1500 Rebel TRX concept truck - a brawny, rugged off-road supertruck that foretold everything a Ram-branded Ford Raptor-fighter could be. The problem is, it's more than three years later now and FCA still has yet to unveil a production version.

But that day could come soon, it turns out, and according to a report from Allpar, the details have only grown more tantalizing in the years since the concept's debut.

Last October, FCA confirmed that the TRX has received the production green light, and suspected prototypes have been spied on at least one occasion, but FCA has been tight-lipped about what we should expect. But according to Allpar's anonymous sources, the production version of the truck will outgun the 575-horsepower 2016 concept with 700+ horsepower - a figure perhaps more fitting for FCA's supercharged 6.2L Hellcat V8.

Those same sources say power will be routed through an eight-speed automatic transmission to a heavy-duty four-wheel-drive system. Not only will it be supremely capable off-road, but reportedly, an optional tow package will also make it handy for pulling a trailer.

Finally, according to the same sources, the Ram 1500 Rebel TRX will pack just about every gizmo in the book into its cabin, including a premium sound system and a 12-inch Uconnect infotainment screen, while the exterior will adhere to the same mean, aggressive styling sensibilities as the concept. This is despite fears that spied prototypes looked relatively "tame," causing many to speculate the production TRX might lack the concept's charisma.

In fact, they say, it will look an awful lot like the yellow Ram 1500 shown in FCA's 2020 Drive for Design contest flyer (top), replete with menacing grille and bulging hood with gnarly black hood vents.

We still don't know when the TRX will finally be unveiled, but clearly, there's a whole lot to look forward to.