If the new rear tires are still as close to the inside box floor as the earlier picture shows, your going to have some serious tire rub. To assume a leaf spring axle doesn't move side to side a bit is a bad assumption. There needs to be at least 3/4" between the widest point on the side of the tire, and any body structure. At 3/4". some rub may occur, but less then 3/4" damage can happen. Years ago I had a couple sidewall damaged tires and a tore up inner fender to prove my point. Gene