Yes, it's best if you have a clamp on each spring of the front segment. You'll have to experiment with removing the rear clamps, and properly fitted slapper bars work excellent for traction control & limiting spring wrap. I have them on my '68. I have them set-up so the front snubber is just barely touching the front spring eye of my 2 right side SS springs.
The car will nearly dead hook on the street from a stop when the Nitto Drag Radials are warm, and that's with nearly 500 hp, a 3000 rpm stall converter, 2.76 to 1 first gear ratio and 3.91's. Without the slapper bars, it just ahnilates the tires.