Someone tell me I ordered the right thing please

With that back space I think it would put most tires to close or rubbing on the fender lip, I have a 70 Dart with 15x7, 4 1/4 back space with offset spring hangers, tires are 255/60/15 and I cut the lip to the pinch welds and have a little more than a 1/2 inch space, there is more than an inch from tire to leaf spring and the car is lower than stock.

Jeff