I replaced my front end this weekend. I got the parts from CanadianMustang.com. I got the right side upper arm off and tried to install the new one. Wouldn't fit! Er? Took a look and found the bolts on the shaft were spaced a wee bit closer together than the old one. Well, thinks I, I'll just waller the bolt holes out a tad and all will be well. But, why bother now, I'll use the other replacement arm and worry about the narrow one when I get to the other side. So, the other arm goes in just fine and I get to the drivers side to try to get the narrow one to fit. I went down to the hardware store and got a rasp for my drill and prepared to show it who's boss. I take the new arm and check the fit first to see how much I need to file. Well, what do you know? It fits on this side!