Strut install

I was about to change my left front strut on my 89 LX and noticed that the space between the mounting bracket at the spindle was wider on my original than on my replacement. It seems that the part numbers are the same for all models 87 on up. I have changed my 96 GT's struts without any trouble and I thought that they all use the same one. Is the spindle wider on a 89 LX 2.3L or am I just imagining things?