There are a few things you need to know in order to drag race with leaf springs. First, you will need a set of stiffer than stock springs. This will help transfer weight to the rear wheels and give you better traction. You will also want to consider upgrading your shocks to something that can handle the increased spring rate. Lastly, make sure your tires are up to the task. A good set of drag racing slicks will help you get down the track as fast as possible.