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250-300lb Rear Adjustable 4 Bar Coilover Conversion Kit GM 1964 - 1966 A Body Performance Control Arm 4 Link Kit
This is a complete rear suspension upgrade kit designed exclusively for 1964–1966 A-Body vehicles. It replaces the factory leaf-spring setup with a triangulated 4‑link suspension + coilover shock‑absorber system, delivering modern handling, adjustability, traction, and durability for street, strip, or performance use.
| Triangulated 4‑link geometry | Eliminates axle wrap, wheel hop, and spring bind; maintains precise rear‑axle location under acceleration, braking, and cornering |
| Coilover integration | Coil springs mount directly over high‑performance shocks, replacing leaf springs to support vehicle weight and provide damping |
| Bolt‑in/weld‑in hybrid | Most brackets are self‑fixturing for simplified welding; minimal frame modification required |
| Adjustability | Fine‑tune ride height, camber, caster, and shock damping for street comfort or track performance |
| 4‑link arms | 2 upper triangulated links + 2 lower control links (heavy‑duty steel tubing, powder‑coated for corrosion resistance) |
| Adjustable rod ends | Heim joints or high‑strength poly bushings for zero deflection and precise alignment |
| Frame brackets | Weld‑on frame mounting brackets (pre‑formed, self‑fixturing) |
| Axle housing brackets | Bolt‑on/weld‑on brackets for Dana 60 or factory rear ends |
| Coilover shocks | Single‑ or double‑adjustable performance shocks (e.g., QA1 MOD Series) with matched coil springs (180–300 lb/in typical) |
| Coilover mounts | Upper/lower shock/coil mounts (double‑shear for strength) |
| Hardware kit | Grade‑8 bolts, nuts, washers, jam nuts, and anti‑seize for full assembly |
| Eliminates wheel hop & axle wrap | Improves traction and power transfer |
| Ride height adjustment | 0–3" drop from stock stance |
| Shock tuning | Single‑adjustable (18‑click rebound) or double‑adjustable (compression + rebound) for street/autocross/track |
| Durability | Semi‑gloss black powder coat; heavy‑duty rod ends resist wear |
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