Legacy Series By Ironworks Speed and Kustom
The Body
At the core of every Legacy Series Production Chevelle is the iconic 1970-1972 Chevelle body—the foundation of these high-end builds. Whether you bring us your own body or need one sourced, we work exclusively with premium, original GM A-Body structures—never subpar reproductions. From as-is transformations to full restorations with fresh paint, each build is meticulously crafted to uphold the Legacy Series standard of excellence.
Currently, the Legacy Series is available exclusively for 1970-1972 GM A-Body applications, including Chevelle, Cutlass, Skylark, and Lemans.
Wheels, Tires, and Brakes
Ironworks Speed and Kustom engineered the Legacy Series braking system to deliver race-proven performance with street-ready reliability. At all four corners, Wilwood 6-piston calipers clamp down on massive 14” two-piece drilled and slotted rotors, providing superior stopping power. Manual transmission cars feature manual disc brakes, while automatic models offer optional power brakes for enhanced control.
Wrapping these high-performance brakes is a set of billet aluminum Forgeline three-piece wheels—lighter, stronger, and built for the demands of aggressive driving. Up front, 19x11” wheels are paired with 285/25R19 Michelin tires, while the rear commands attention with steam-rolling 20x12.5” wheels wrapped in 335/30R20 Michelin rubber-ensuring maximum grip and a bold stance.
The Chassis
Every Legacy Series build starts with a completely new Roadster Shop chassis, engineered to our exact specifications. Featuring box-welded construction and reinforced gusseting, this chassis is stronger and more rigid than any stock frame, ensuring superior performance and durability.
Both the front and rear feature fully independent suspension, with tubular control arms up front to accommodate wider wheels without clearance issues. This setup delivers exceptional handling, ride quality, and stability. To maintain consistency, reduce costs, and streamline production, Roadster Shop custom-fabricates a floorboard specifically for our chassis-ensuring a seamless, high-quality foundation for every build.
Engine and Transmission
At the heart of every Legacy Series build is a supercharged LT4 engine, delivering a factory-tested 650HP straight out of the crate, with optional power upgrades for those who demand more. A set of mid-length stainless steel headers flows seamlessly into a TIG-welded, 3” full-length stainless exhaust, fine-tuned with Magnaflow mufflers and resonators to produce an aggressive yet refined tone. Want more power? An 800HP upgrade is available for those craving extra adrenaline.
Power is channeled through either a 10-speed automatic or a Bowler T-56 6-speed manual, both seamlessly integrated with factory GM wiring and ECU, just like a modern ZL1 Camaro. With 3.70 rear gears, highway cruising at 80 MPH keeps the engine at a relaxed 2,000 RPM, while rolling through town at 50 MPH settles in at just 1,500 RPM-delivering the perfect balance of performance and drivability.
Interior
Every Legacy Series build undergoes extensive floor modifications to accommodate modern performance and comfort. The transmission hump and driveshaft tunnel are raised for optimal fitment, while recessed seat mounting points provide increased headroom. Widened rear wheel tubs allow for a more aggressive stance, and the fuel tank is recessed into the trunk, enhancing ground clearance without sacrificing capacity. Once the structural work is complete, the entire car is fully insulated for a refined driving experience.
Inside, DJ Designs transforms 2016-2020 ZL1 Camaro seats for a seamless integration of modern comfort and classic styling. These seats feature full power adjustments, heating, and cooling, with custom carbon fiber seat backs that retain an OEM-inspired look. The carbon fiber door panels echo the originals while adding a modern edge.
The dashboard is meticulously crafted from carbon fiber and billet aluminum, ensuring strength, durability, and a high-end finish. Dakota Digital RTX gauges provide the perfect blend of classic aesthetics with modern technology, delivering an OEM-style appearance with cutting-edge performance data.
1970-1972 GM A-Body Platform
