I have a 64 Fairlane I did a PST disc bake conversion on the front. I have torque Thrust D's with a Ford off set.
I had to get a 3/16" spacer as the wheels hit the calipers. I really didn't like the idea of a spacer but had no choice.
I got the spacers at a Mustang specialty place as the parts stores sell 1/4" and thicker spacers and I wanted the thinnest one I could get.