For GMC C15 1973-1987. for Chevrolet C10 1973-1987. Designed specifically for Chevy C10 and GMC trucks 1973-1987. This kit will make a 3" drop in the Front with our Dropped Coils and a rear axle flip kit that 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.