BDS 4 Inch Lift Kit | Chevy/GMC 3/4 Ton Truck/Suburban (1973-1976) 4WD | 4 Inch Block Kit | NX2 Nitro Series

Rear lift is achieved via a 4 Inch Block Kit — cast steel lift blocks designed to provide correct pinion angles. Paired with NX2 Nitro Series shocks featuring a nitrogen-charged twin-tube design, 10-stage velocity-sensitive valving, dual-welded ends, a 1-3/8-inch high-flow piston, self-lubricating seals, and a silver powder coat finish.

Overview

This 4-inch lift kit from BDS Suspension is designed for 1973–1976 Chevy and GMC 3/4 ton trucks and SUVs (K20, K25), improving stance, performance, and capability with clearance for up to 35-inch tires. Up front, the kit includes Glide-Ride leaf springs, a 4-inch steering arm for steering correction, brake line brackets, and precision-tuned shocks. The rear lift option is available as a block kit, block kit with add-a-leaf, or full replacement leaf springs. BDS Glide-Ride leaf springs use an exclusive triple-stage, multi-leaf progressive spring rate design that provides a smooth ride under any load while maintaining flexibility throughout the suspension cycle.

Features

• 100% bolt-on installation
• Glide-Ride front leaf springs provide full lift height and increased capacity
• 4-inch steering arm maintains proper steering angles for improved handling
• Cast steel blocks and available add-a-leaf provide a level stance from front to rear
• Standard NX2 Nitro shocks with vehicle-specific valving
• Upgrade option to FOX 2.0 Performance Series shocks for maximum on- and off-road performance
• Rear lift available as 4-inch block kit, block kit with add-a-leaf, or replacement leaf springs

Specifications

• Lift Height: 4 inches
• Tire Clearance: Up to 35 inches
• Front: Glide-Ride multi-leaf progressive leaf springs with triple-stage design
• Front: 4-inch cast steel steering arm
• Front: Brake line brackets included
• Rear Block Option: Cast iron lift blocks designed for correct pinion angles; OE style rubber bushings installed (#001408)
• Rear Add-A-Leaf Option: Provides an additional 1 inch of lift; includes new center pins; reduces axle wrap
• Rear Leaf Spring Option: Multi-leaf progressive design; eliminates need for lift block; maintains factory payload weight ratings
• NX2 Nitro Shocks: Nitrogen-charged twin-tube design, 10-stage velocity-sensitive valving, dual-welded ends, 1-3/8-inch high-flow piston, self-lubricating seals, silver powder coat finish
• FOX 2.0 Performance Series Shocks: 2-inch impact extruded aluminum body, internal floating piston (IFP) monotube design, CNC machined 6061-T6 aluminum mounting ends, 5/8-inch hard chrome plated heat-treated alloy steel shaft, race-developed high-flow piston, application-specific valving, clear anodized finish

Installation

• Estimated Time: 5 hours
• Difficulty: Moderate
• Special Tools Required: Ball Joint Separation Tool, Cut-off Tool

Important Notes

The 3/4 ton commonly came with a factory 56-inch eye-to-eye rear leaf spring. However, some were produced with a 52-inch rear spring. If ordering rear leaf springs, be sure to measure your factory rear spring before ordering. If equipped with a factory front sway bar, a sway bar drop kit is available in the accessories section. #001408 comes with OE style rubber bushings installed.