If your car is a ":local" car , that is not from northern climates w lots of salt / rust etc, you can have the current springs rearched....or have themmadd in a leaf....I added a leaf a few yrs ago in my sagging 57 Studebaker ,got it perfect, very inexpoensive...or you can buy the 4 leaf for the 'std' stance, for the higher rear, stiffer ride etc get the 5 leaf.... I just bought new 4 leafs for my 69 last fall....