Moog 8304 Coil Spring Set Powder-coated to protect against corrosion Designed to lower stresses for longer service life All coil springs are 100% load tested Worn or sagging coil springs can cause premature tire wear due to vehicle misalignment Use on Ford vehicles from 1967 - 1977 Spring size: Inside Diameter 3.875", Bar Diameter .609", Installed Height 10.5" Load rating: 1587 lbs. One square and one tangential end All coil springs meet or exceed OEM (original equipment manufacturers) standards