Are those American Muscle AMR wheels? If so I am running 18x9 front rear on my 72 dart. On the front I bored out the wheel with a hole saw and then a round flapper wheel on a drill. for the center cap I painted my dust cap as close of a.color as I could find. My wheels are charcoal and you can't tell it till you get up close. What rear disc brake set up are you running?