| When you lower these cars, it changes the angle of the front control arm. Regardless of what many spring and shock vendors will tell you, most of the lowering springs on the market for the cars from 70-78 create a handling problem in the front end that needs to be corrected. The easiest way to tell if you need them or not is look underneath your Z from the front of the car when it is sitting on the ground after you've driven it. Pay particular attention to the angle of the front control arms. The wheel end of the control arm should be lower than the pivot end or inboard end. In other words as the control arm heads towards the wheel it should slope or angle gradually downwards. If it goes upwards towards the wheel, or if it is flat, then you need these ball joint spacers. They're very easy to install and are a direct bolt in. Be sure to check out our adjustable rear camber bushings as well. Most lowering springs cause rear negative camber, regardless of what other spring vendors will tell you. We'll walk you through it so you can make up your own mind, just like we did on these ball joint spacers. Last update 02/10 | 
