I run a 245-60r-15 on a 15 x 8 Corvette Rally 4.0 back space and they just lightly touch the sway bar at full lock on my 88 SS. The factory 15 x 7 N90 wheels cleared using the same tire with no problem.
I ran 235/60's on some centerlines that cleared 81 monte inner fenders with shortened springs...same combo rubs on 83 regal inner fenders with same springs. Same tires on 82 x bbody x 7" dont come near where those centerlines did. Backspacing is key.
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