See my private message. Here is photo of my 57 President Classic. The rear bumper sits on an angle on this car, probably the wrong bumper brackets. 55 Commander may be the same. Photos attached. The first photo (on the left) is mine, the second photo is another, with the right angle on the bumper, although it appears to angled up a little, possibly due to being pushed, what was quite common in those days, the real definition of a "jump start". Thanks.