Had the same problem with a replacement bucket. Reordered twice with the same results. Wrong side bucket in the right box with right part number. Take one of the bad buckets out and hold it in front of the other side of the car and look at it there to see if it lines up on the other side, it worked for me. the guys at the chevelle catalog actually checked the new one on their car before they sent it. They said G M mismarked them.