What width rear end for Duster Street Strip stance?

This is a stock width 8.75 with 10 in. Centerline's, the quarters had to be trimmed for the drag slicks, it dosen't have mini tub's and the SS springs are in the stock location. 15x10 5 in backspace centerline, did have to use a 1/2 in spacer with 10.50 slicks to stop spring rub.

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