Those rears are actually a 5" backspace. My mistake. It'll fit as far as the leaf. The seven inch fronts are a 4" backspace. You have a lift but the outside is gonna be close. Mine barely fit. I rolled the hell out of those wells. Rolled the front fender also and radiused the bottom of the front arch for clearance.
I have an 8.75" from a 72 duster. I think it was an open attached to a slant. Eaton locker now. Might be original springs. New bushings and short shakles. Hdk front with mustang ii 2" drop spindles. 12 inch spring I think. No torsion bars. The eights up front were plowing and would rub the ARB.