Leaf springs for dart swingers.

Clamp the springs fore and aft, cut or unbolt the center bolt, Add an extra leaf and bolt back together with a new center bolt. Sounds easy but remember, the springs on your car are worn out and sagging. Adding an extra leaf may not help much. Your main leaf is shot it looks like to me.
Yea your probably right I'm better off buying new springs. The springs that are on it dont have alot of miles on them they have been replaced before but i got them from jc whitney I dont think they was much to start with.