63-72 C10 C-Notch 6in

The QA1 63-72 C10 C-Notch 6-inch rear suspension kit is a complete adjustable suspension system engineered for 1963–1972 Chevrolet C10 pickups and full-size GM trucks. This single-adjustable kit addresses the fundamental challenge of lowering classic trucks while maintaining ride quality and handling geometry—a critical concern for builders seeking functional dropped suspensions rather than stance-only setups.

The kit ships as a comprehensive package including coil springs, single-adjustable shocks, trailing arms, a panhard bar for lateral locating, and a factory-style brace bar for structural support. All steel components arrive in a durable black powder-coat finish designed to resist surface corrosion in harsh conditions. The 6-inch drop specification is calculated to work with the C-notched frame geometry, which removes material from the frame rail to allow the rear axle to travel higher into the wheel well. This approach maintains proper suspension articulation and avoids binding that can occur with simple lowering blocks or leaf-spring modifications. The adjustable shock absorber allows tuning of damping characteristics to match wheel travel and load conditions.

This system is purpose-built for restomod and custom truck builders who prioritize suspension geometry over purely visual results. The trailing-arm design controls axle windup under acceleration and braking while the panhard bar manages lateral axle movement, both essential for drivability at highway speeds. Builders working on frame-off restorations, custom hot rods, or street trucks benefit from QA1's focus on maintaining OEM-compatible mounting points and proper suspension kinematics through the lowering process.

At 25 pounds, the kit's weight reflects the use of solid steel components without aluminum substitutions, prioritizing durability in a system that manages the truck's rear weight transfer. Installation requires careful frame notching and welding—a task suited for experienced fabricators or professional shops familiar with suspension geometry and frame modification.