My used 1969 Mustang Convertible (302) had multiple cracks in the LH shock tower due to the upper control arm making very slight contact with the shock tower. The area of contact was the front radius of the forward end of the pivot shaft. The rubbing was slight but the cracks severe. I welded them all up and installed these plates. 5 years later, no further cracks or welded crack propagation. If you cant weld, remove your suspension, clean the area up and have a local mobile welder install them. Then get a Monte Carlo bar. Some trimming by a bench grinder may be required to get a really good fit. Once in place, bang it hard with a hammer and "set" it into the chassis for welding. This is a must have for 50 year old cars.