Wheel spin issues

not arguing here - just copying and pasting something I just read on Hotrod.com - and I am also not saying I believe Hotrod magazine is the be all and end all of what's to be said about going fast.:
Mopar's Super-Stock leaf springs are a great way to stiffen up the rear of the car, preventing axle wind-up and improving traction, and we consider an adjustable pinion snubber mandatory on a performance Mopar with leaf springs. Adjustable shocks will also allow you to tune the compression and extension times, keeping the tires planted to the pavement for optimum grip.
Up front, torsion bars with less spring load and shocks that extend easily will allow the front of the car to rise during the launch, transferring weight to the rear wheels to help traction. Be careful, however, as drag racing shocks and weaker torsion bars will compromise your car's cornering ability. Again, you need to decide how much you're willing to compromise handling for improved starting line traction.
While four-link or ladder-bar suspensions are probably the best way to get a Mopar hooking up, most of our cars are equipped with a leaf-spring rear suspension. There are kits to eliminate the factory springs, or to add a bar between the axle tubes and the front spring mount, but unless you're making serious power, simply attaining the proper geometry can help you achieve great traction with the parts you have. A leaf-spring car should have six to eight degrees of positive pinion angle to plant the tires firmly during a hard launch, and pinion angle is easily corrected with shims between the axle tubes and the springs. Additionally, a four-wheel alignment will ensure the car is tracking properly.