This rear axle flip kit will allow you to drop your 73-87 truck 5" in the rear with a simple bolt-on installation and includes axle locators, axle mounting plates, U-bolts, and lock nuts and washers.
Street Edge 6" Rear Axle Flip Kit for 1973 to 1987 Chevy/GMC C-10
3" in Lowering Drop Spindle 1.25" Rotor For 1973-1987 Chevrolet Chevy C10 2WD
2.5" Front Drop Spindles Lowering Kit 1.25" Rotor For 1973-1987 Chevrolet C10
Drop Spindles 2.5" Front 1973-1986 1987 Fit For Chevrolet C10 2WD W/1.25" Rotor
For 1973-1976, 1979-1987 Chevrolet C60 Wheel Cylinder Dynamic Friction 59857FS
For 1973-1976, 1979-1987 Chevrolet C60 Wheel Cylinder Dynamic Friction 36393QR