Let’s see those 255 60 15 rears!!!
Here you go, there was 3/8 of an inch before the leaf spring. this is a 255 60 15x7 with 4.25 backspace! off my 67 barracuda. it fit but tight on the lip as you can see. i can roll the lip, but i rather not and just get a 15x7 with 4 3/8 back space should work.