1966 Chevrolet Chevelle SS - 138 code Super Sport

Classic Car Addict is proud to offer this exceptional 1966 Chevrolet Chevelle SS for sale in our Mesa, Arizona showroom. This documented 138-code Super Sport underwent an extensive frame-off restoration that began in the early 1990s and was meticulously completed by a dedicated enthusiast over the course of more than a decade. Built with attention to detail, performance, comfort, and drivability, this Chevelle features lots high-quality upgrades.

Exterior:
The restoration began with the body being separated from the frame and entrusted to a professional body shop for extensive metalwork and panel replacement, all supported by detailed receipts. Replacement components include both full quarter panels, a bare driver-side door shell, radiator support, rear window and trunk filler panel, right inner fender well, front dash assembly, and a trunk floor section, sourced from Original Parts Group and other reputable restoration suppliers.

Following the completion of the bodywork, the Chevelle was refinished in its factory-correct Marina Blue using a modern base coat/clear coat system, delivering exceptional depth and shine. Exterior trim has been professionally polished, while new chrome front and rear bumpers, headlights, taillights, and windshield further enhance the car's fresh appearance.

Interior:
The interior has been completely refreshed with TMI Sport R bucket seats front and rear, complemented by a new headliner, new carpet, stock-style door panels, and new door and window hardware throughout. An Ididit tilt steering column replaces the factory unit, while a Dakota Digital VHX gauge cluster provides readouts for fuel level, temperature, speed, tachometer, oil temperature, and voltage. The cluster includes a 160-mph speedometer and an 8k-rpm tachometer.

Additional interior features include a RetroSound radio with upgraded speakers and professionally installed Vintage Air conditioning. DEI heat shielding was installed along the floor and transmission tunnel, while Boom Mat insulation helps reduce both heat transfer and road noise for a more refined driving experience.

Engine:
Power comes from a 6.0-liter LS-based cast-iron V8 sourced with approximately 40,000 miles. Before assembly, the engine was completely disassembled and inspected, revealing factory crosshatch marks still visible in the cylinder walls, a strong indication of minimal wear. The engine was then rebuilt with brand-new GM LS3 aluminum cylinder heads featuring new valves and valve springs, along with an LS3 intake manifold, factory fuel injectors, and ignition coils.

Airflow is enhanced by a FAST 90mm Big Mouth cable-operated throttle body fed by a K&N cold air intake, while MSD ignition components provide reliable spark. Engine management is handled by a FAST EFI system that currently operates on a base calibration. The system starts and runs well but would benefit from a final chassis dyno tune to optimize the fuel and ignition maps, as evidenced by a slight idle surge.

Fuel delivery is managed by an Aeromotive Phantom in-tank fuel system feeding the injectors through stainless steel fuel lines. Engine temperatures are controlled by a Griffin heavy-duty aluminum radiator paired with an electric cooling fan programmed to cycle automatically at 170 degrees.

Transmission:
Backing the LS powerplant is a T56 six-speed manual transmission equipped with a hydraulic throwout bearing. Power is sent through a custom Dynotech DOM steel driveshaft measuring 3.5 inches in diameter with a .083-inch wall thickness. The driveshaft has been high-speed balanced specifically for the T56 output shaft.

Rear Axle:
Power is delivered to a Moser Ford 9-inch rear axle built with Chevelle-specific brackets, a Posi differential, and aggressive 4.11:1 gears. This setup gives the car the strength, traction, and gearing to match the LS powertrain and six-speed manual transmission.

Chassis:
Prior to drivetrain installation, the frame was separated from the body, media blasted to bare metal, and reinforced with full-length 1/8-inch steel boxing plates to increase chassis rigidity and durability. The undercarriage reflects the quality of the build, presenting with a clean black-coated floor pan, no visible rust, no fluid leaks, and neatly routed fuel and brake lines throughout.

Suspension:
The chassis is equipped with a comprehensive suspension system from Classic Performance Products, delivering modern handling without sacrificing the Chevelle's classic character. Up front, CPP round-tube control arms are paired with C6 Corvette spindles, a 1-inch lowered spring setup, and a CPP power steering gearbox for improved steering response and road feel.

Out back, a CPP rear suspension system supports the Moser rear axle, providing additional strength, stability, and control.

Brakes:
Braking performance has been significantly upgraded with 13-inch four-wheel disc brakes, a CPP power brake booster and master cylinder kit, and heavy-duty CPP sway bars at both the front and rear to enhance cornering confidence. All factory rubber brake lines have been replaced with precision-bent stainless steel hard lines for long-term durability, reliability, and a clean undercarriage appearance.

Exhaust:
Exhaust duties are handled by JEGS ceramic-coated LS swap headers feeding a custom 2-inch dual exhaust system that exits through polished side-exit tips, giving the Chevelle an unmistakable muscle car sound to match its modern performance.

Documentation:
This documented 138-code Chevelle SS will be sold with an extensive file of original purchase receipts supporting the restoration and build.

The Chevelle will be sold on a clean Arizona title. Call Classic Car Addict today at 480-256-1459.

All information, specifications, and options listed on this vehicle description page are provided solely for informational and convenience purposes. We make every effort to ensure accuracy, human or technical errors can occur.