On mine the ford 9 inch was narrowed (Thank you Ben) to 51" and with stock frame rails it is close to the tire. I have 1/4 spacers behind each wheel for space. Now I am running 245/60/15 BFG TA's but it had wider tires on the rear when I got it, I don't know how close either are to a 26x9.
This was when I was installing the rear. The old tire was a 255/50/15
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Here is a recent shot with the BFG's, not tucked but not rubbing either.
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