Hellcat Challenger

A full rebuild of a 1971 Challenger that keeps the classic shape and puts a modern Hellcat drivetrain underneath it. It’s in final assembly now, so this is the build as it stands rather than a finished car.

Two things usually happen when somebody puts a late engine in an early body. Either the body gets butchered to make room, or the engine goes in half-heartedly and the car never quite drives like the thing it’s pretending to be. The brief here was neither: a ’71 Challenger that still reads as a ’71 Challenger, with a supercharged 6.2-litre Hellcat V8 sitting in it properly.

Making a modern driveline fit an early car

The engine is the headline, but it’s the least of the work. A supercharged Hellcat V8 is physically bigger than anything Chrysler put in this car in 1971, and it comes with a modern car’s worth of expectations attached — where the accessories sit, how it’s cooled, how it’s wired, what it wants to mount to. Getting it in has meant extensive modification throughout, and every one of those changes has to end up looking like it was always meant to be there.

That’s the part of this job that doesn’t photograph well and takes the most time. It’s also the part that decides whether the finished car is genuinely usable or just very good-looking.

Straight first, then colour

Before any of the red went on, the body was taken straight and sealed in poly primer — the whole shell in one flat grey, which is the only state in which you can actually see what a panel is doing. A metallic laid over average bodywork will find every wave in it, and this one is a deep custom red with a lot of movement in the light. There was nowhere to hide.

The stripe you only see side-on

The stripe and the Hellcat logo are laid into the paint rather than sitting on top of it — ghosted, so from straight on the car is simply red, and it’s only when the light comes across the panel that they appear. It’s a quieter way of doing a graphic than a vinyl or a hard-edged stripe, and it’s permanent: there’s no edge to lift and nothing to replace later.

Bumpers made to fit

The bumpers are custom and flush-mounted, made in-house rather than bought. A factory Challenger bumper stands off the body on brackets with a gap all the way around it; pulling it in tight to the panel changes the whole front and rear of the car, and it’s the sort of alteration that has to be fabricated to suit this shell specifically.

Where it’s up to

Final assembly, with a full custom interior and the finishing details still to come. The photos and clips below are the build as it actually is right now — we’ll add the finished set here when it’s done.