Mini tub with spring location on 70 duster

That is what size wheel we run on Dad’s Duster. We ran a 28x14.50 Hoosier Quick Time Pro on a 10” wheel with 6.5” backspacing. The wheel well openings of the quarter panel have been opened up a bit to accommodate the 28” tall tire. Was very close to the front edge of wheel well opening before they were opened up.