rest easy machine090767. I did some messing around with it tonight and found out that the '56 is a total of 6" high, while the stock one is over a foot with the plastic lip on the bottom. So apart from being about a foot too wide overall, it's also about half as tall as the stock one. So the '56 chevy bumper install is a no-go.
But, while I was messing around with it I did manage to get the stock one hung straighter than it previously was. So, not a total loss!