Tuff Country 97000 Block & Ubolt Kit - 3" (H) x 2 1/2" (W) x 4 3/4" (L) Tapered

Lift the rear of your Chevy or GMC truck with confidence using the Tuff Country 97000 Block & U-bolt Kit. This bolt-on solution adds a 3-inch rear raise while preserving a factory-style ride, making it ideal for classic 4x4 builds, towing needs, or simply achieving a balanced stance.

• Lift height: 3" rear lift blocks provide a solid, level stance for the back of the vehicle.
• Block design: Tapered lift blocks are engineered to minimize driveline vibration and help maintain smooth operation.
• Block material: Heavy‑duty cast iron blocks (some kits may include aluminum blocks) for durability and long-term performance.
• Block dimensions: 3" (H) x 2 1/2" (W) x 4 3/4" (L) to fit the rear suspension setup.
• U-bolts: Zinc-plated extended rear u-bolts, sized 5/8" x 2 3/4" x 12 7/8" (square ride), included with the kit.
• Installation: Simple bolt-on process that inserts the blocks between the factory rear leaf springs and axle.
• Rear-axle application: Designed specifically for rear axles; not suitable for front-axle use.
• Shocks compatibility: On most applications, factory-length shocks must be replaced with extended-length shocks when installing rear blocks 2" in height or taller.
• Fitment: Designed for 1969–1972 Chevy and GMC 4WD models, including Blazer, Suburban, and Truck variants in 1/2 and 3/4 ton configurations.
• Brand: Trusted Tuff Country engineering, built to endure with rigorous world‑class suspension components.

Benefits: This kit raises the rear to improve load handling, trailer towing clearance, and overall stance without altering the front suspension. The tapered blocks and zinc-coated hardware work together to reduce vibration and resist corrosion, helping maintain performance in diverse driving conditions. The bolt-on design minimizes downtime and eliminates the need for welding, making it a practical upgrade for restorations or early‑generation Chevy/GMC trucks. If you’re upgrading to taller blocks, plan on pairing this kit with extended-length shocks to preserve ride quality and suspension travel.