Caltracs vs Slide A link Vs SS springs

And if the SS springs make it so their is more weight on the tires for more traction would this be the same with and Leaf springs like the ones from Jc whitney with the bend in them to raise the car

The S/S springs are heavier due to more leafs. Not the metal used or made heavier on purpose for traction. Traction is gained when the drivetrain and suspension is set up right, the rears center section rotates and bends the springs forcing the tires to the floor. The rear end of the car rises at this point. If it squats, it's wrong. GM's squat, thats there design.

You should have the chassis book from Mopar where inside they explaintis well. It is to lengthy here to type out an explain.

I have no clue about JC Whitney springs. I know nothing about them.