Trailing Arms - Rear Upper 68-72 GM A&G-Body

The Trailing Arms - Rear Upper 68-72 GM A&G-Body by QA1 is engineered for builders and restoration specialists working on classic Chevrolet muscle cars and mid-size platforms from the late 1960s through early 1970s. If you're upgrading a Chevelle, Cutlass, Skylark, or Tempest with modern suspension geometry and improved handling characteristics, these upper trailing arms are critical to establishing proper rear suspension alignment and geometry. They replace worn or bent OEM units and serve as the foundation for a responsive, stable rear end—essential when adding power or refining cornering performance on street or strip applications.

QA1's trailing arms are manufactured to precise tolerances and incorporate robust pivot points designed to handle increased loads and suspension articulation without deflection or play. The upper arm geometry controls rear axle tracking and rear-wheel camber as suspension cycles through bump and droop, directly influencing tire contact patch consistency and anti-squat characteristics under acceleration. At 8.65 lbs per arm and measuring 20.2 inches in length, these units integrate seamlessly into A-Body and G-Body frame configurations, maintaining OEM mounting points while delivering the rigidity and compliance modern performance demands. The design accommodates both bolt-in installation and aftermarket coil-over or leaf-spring systems without modification to core frame structure.

Enthusiasts restoring or restomodding 1968–1972 GM A&G-Body vehicles—particularly those pairing upgraded engines, braking systems, or independent rear suspension conversions—will find these trailing arms indispensable for achieving balanced suspension tuning and eliminating bind or slack in the rear suspension linkage. Whether you're building a show-quality restoration, a street-strip hybrid, or a weekend cruiser expecting sharper handling, QA1's engineering ensures your rear suspension remains planted and predictable through corners and under hard acceleration.