I have two top frames for my car and need to know which one is correct for a 1956 TR3. I think it's the frame on the right. If you look at the pivot arms you will see they are not the same. The frame on the right even has a snap on each side on the inside of the center pivot arm. It also looks like I would need to remove the triange shaped mounting bracket from the one on the left if I'm correct. I'm sure this is one of the many changes made over the years.