I bought some pretty nice suspension parts from a guy that's putting a full Griggs setup, among other things, in his '66. The shackles that are on the mid-eye leafs are shown in the picture. They are pretty heavy duty, by the looks of what I got he must have been using the car for some vintage racing. I just want to find out what they are, and to make sure I get them put back together right. The side plates are rounded on three corners and square on the third, plus the holes are offset to one side, so there is definitely a certain orientation that they need to be installed. You can kind of see in the pic (under my thumb) a note that says 'rear' with an arrow, but that's not the way they are installed. Anybody help?