spring relocation inboard help

I've got 275/60/15's on my 68 Dart. All I did was move the front hanger against the frame and moved the shackle bracket and the spring perches to match. It was about 5/8" on each side. I have not rolled the lips either. It's a tight fit, but nothing rubs. I'm not sure how different the rear wheel tubs are between the 68 and 72 though.