Had a '91 Escort wagon back in the day ('96) and replaced rear struts & broken springs, but body wasn't too rusty at that time. Anywho, friend had a 80's Chevelle with rusted out strut mounts on the body; had his friend weld in 1/4" plate for $20 and it looked rock solid. Welding might be the only option if where it mounts to body is rusted out?