Different Lenght A Arms?

When I put a 9" wheel in the front, I noticed really bad rubbing on the driver's side. Under minimal turning, braking, etc. I checked the fender height between both sides and the driver's side was .25" lower so I put some rubber spacing under the spring so that both sides were even. I hadn't had any sort of rubbing at all on the passenger side, under full lock, hard turning or anything so I was surprised that .25" made that much of a difference. After adding some spacing, it still rubbed quite a bit, although not as bad. After closer examination, the driver side actually sticks out at least .25" further on the driver's side. I know its not the wheels because both are the same distance to the strut. Is it possible the stock A arm is longer on the one side? Or is this caused by alignment? I can't find anyone else with this issue. Any ideas?

I suppose I'll have to take it to the alignment shop. It drives straight though and probably only has a couple thousand miles since the last alignment. The chassis only has 78k miles. It makes good power now but I have proper chassis stiffening and no drag launches. And even still it's only been making said power since a little after the last alignment.

MFE92 said:

Welcome to what passed for "precision" in the assembly of the foxbody mustang. Totally normal for these cars, it's just that most people never look close enough to notice. For ****s and giggles, find the exact center of the K-member by stringing an "X" between the A-arm pickup points, drop a plumb bob from the center of the X, and mark the floor. Drop the plumb bob under the center of each balljoint, and mark the floor there too. Measure the distance from center to balljoint on each side. That will eliminate any question about whether or not the A-arms are the same length. And they will be, because the various A-arms are more than 1/4 inch different in length.

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I figured it was a flaw in the super high tech chassis. I'll have to try this.