I have a 68 with mono leaf springs. Recently I had new quarters put on and now I have a tire that rubs under certain bumps and swails in the road. I took it back to the body shop and they indicated one side of the car is actually about 1" lower than the other, but the leaf springs look fine. They indicated trimming the quarter would not be wise. Do I need to replace both springs? Or maybe a new set of shocks? I want a smooth ride like it has now, so I don't want to make the ride worse, just get it up off the tire a little. Thanks in advance for the help!