The steering box that came out of my '59 DeSoto Fireflite had a casting number of 1822734. I had it rebuilt last year and it never worked quite right after the rebuild with a lack of power assist at slow speeds, such as when turning around on a driveway. I sent it back for them to look at again and sometime while they had it the second time, they acquired another box that they have rebuilt and shipped to me in order to "get me back up and running sooner". I have suspicions they found something in the original box that is not fixable that they aren't fessing up to. The replacement box has a casting number of 2127091. Aside from the number, are there any differences between these boxes? If they are the same otherwise in fit and function, I guess I can live with it the way it is. I just don't want to find out the hard way by going through yet another round of installation and removal because that's still not a quick process, even given how practiced I am getting at it.