I have a set of 15x7 Mustang 10 hole wheels on my 75 Pinto. They're 5" backspace and the rears clear fine. The fronts didn't. The upper ball joint bolt heads dug into the rims and locked the front tires. I shaved the upper ball joint bolt heads and a bit of the upper A frame and added 5/16" wheel spacers L and R. the wheels clear completely now, EXCEPT on a full lock right turn. Then there is a rub on the R/F wheel. The rubber is 195/55-15. Also like Dick says with the 5" backspace, the wheels are tucked into the wheel wells pretty far.