Some add a leaf and cut it off about an 1" or 2 behind the spring mount to strengthen the front segment and clamp them. Helps with axle hop, traction, and adds a little more height.
I did it with my Ragtop because I bought a set years ago and they were too short when I tried to use them a few years later.:BangHead:
The PO of my Swinger added a beefy short leaf that must have been out of a pick up. It jacked the back up and it does have a firm ride. Not teeth chattering though. I should just order some springs and parts from Espo and fix it right.