Five extra inches can undo a classic car’s proportions. Ringbrothers’ Billie takes on that problem directly, widening a 1965 Pontiac GTO convertible while retaining the visual identity that makes the original worth revisiting.

The new SEMA build puts extensive fabrication ahead of bolt-on ornament. Designer Gary Ragle broadened the fenders and doors by 2.5 inches on each side, while carbon fiber appears in the hood, door skins, and front valance. The result brings the familiar open-top muscle-car silhouette into a materially different footprint.

Underneath, a Roadster Shop chassis and suspension support the reconstruction, accompanied by a modern drivetrain. That combination captures the central appeal of restomods: familiar shapes can accommodate a thorough mechanical rethink without becoming period reproductions. Ringbrothers devoted roughly 5,500 build hours to Billie, a useful measure of how much work sits behind its apparently straightforward outline.

The cabin is fully bespoke, with a GNTX-R automatic-dimming mirror adding a discreet contemporary function. A carbon-fiber substructure supports its slim profile, while sensors, a microprocessor, and electrochromic gel manage glare. It connects the show-car craftsmanship to something useful from the driver’s seat.

Billie is presented as a custom build at SEMA in Las Vegas. Ringbrothers has not announced a production series or retail availability.