Hey 57 Mike I just finished rebuilding the 3/4 ton springs I have, the 2 leafs I removed are #s 3 and 4 from the top (top being the main or longest). The remaining 5 lower leafs all measured out the same as the 1/2 ton spring.You just have to shorten the clips that hold the leafs in alignment to fit the narrower pack.Good Luck Biddaboy
