For class racers where every .01 counts, the tunability of Cal-Tracs can be a benefit. For the average bracket racer or street warrior, the extra tuning can take you down a path of mistakes.
If you are using the typical 15" street radial, you will never hook anyway. If you are using a soft compound dual purpose tire, street traction is still a compromise, but track grip will be improved. Adding clamps to the front segment is minimally expensive. I'd certainly try that first to see what that nets you. Setting up the suspension to rise in the rear is what you are after. You can also remove a clamp in the rear to assist this.
After that then you get in to extra effort or cost solutions. Adding a leaf will help stiffen the front segment and raise the overall rate. Not expensive, but high on effort. Going to a traction system is high cost with a medium amount of effort. Changing leaf springs would similar be high cost with a fair amount of effort.
Another thought here if you have access to cheap stock parts, swap in a SS spring front hanger, use an A body main leaf and transfer the balance of your 340 spring pack under the A body main leaf. This creates a psuedo-ss spring. The shorter front segment and realigned spring pack will be stiffer, aid traction, yet still be softer riding than a full blown SS spring.
