What rear suspension for bracket racing.

The mopar chassis book recommends if using stock springs to clamp the front leaves. If you've done this, what did you use to clamp them? Did you make your own?
I made my own claps.I also used aluminum front spring bushings.My springs are moved in so I just welded in rear sliders to the frame.Using the 002 and 003 springs installed around 98.I would build it different today if I was starting over but no regrets.