I have a 75 and run 15x10 with 4 1/2" backspace. I run ET Streets 28x12.5x10 before I put the Hotchkiss 1.5" rear drop leaf springs. The ET Streets have a wide section width. I now run The Hoosier Qwick Time Pro 28x11.5x15. Hoosier's are 10" wide vs ET 9.9" wide and the Hoosier's have a 1" less section width and same 28" tall so you shpould have no rubbing issues.
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