It might help, but the old springs just don't flex like modern ones do. If it were mine I would get springs out of a modern 3/4 ton both front and back and just make them fit. If you want it to sit up higher, put some blocks between the axle and the springs. I know quite a few ranchers that put a weight in the back of their pickup to make it ride better and then remove the weight if they pull a traile.