Fitted on 70 Chevelle with tall upper ball joints and rebuilt stock upper and lower wishbones. So far so good, the car appears to have driven around 500 miles. Steering and handling are better than you'd expect from the GM 64-83 A body, which had terrible handling from the factory. If I had to do it again I would buy new upper arms for better caster and camber. High tops don't solve these problems as well as the newer modern wishbones. The bottom corner of the lower arm caused a slight rub on the back of the brake disc. In tight turns, the control lever touched the brake disc. A light grind on the nose of the control lever solved this problem. Hope they are long lasting. The time will show.