For GMC C10 1973-1987 1/2 Ton Truck. For Chevrolet C10 1973-1987 1/2 Ton Truck. 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.