255/60r15 on stock 68 Dart

I just picked up my tires today! After a lot of research and measuring, I went with 255/60r15 on the back and 225/60r15 on the front. The rear wheels are 15X7 with a 4 1/8" backspace and 3mm offset. The fronts are 15X6 with a 3 1/4" backspace and -6mm offset. The rear tires are about 5/8" from the springs and a 1/2" from the fender lip. Everything is stock except the 1" lift ESPO springs.