That looks like the front motor mount on my 55 Town Sedan but I'll have to jack my car up and crawl under it to be sure. Too hot today (101F or 38.3C). Maybe in the morning while it's still in the lower 80s before the sun comes up.
That is not a 1955 Ford part - it appears to be a bracket that holds a portion, or maybe the center, of where a grill would go. It would span between the gravel pan and the hood latch panel from what it looks like.