14x7 rally's or steelers?

Did Mopar ever make a 14x7 rally or steelie that would work on my '75 Duster (front disc brakes, big bolt pattern)? If so, what cars/years did they come on?
Further to the above, is there any way to tell the width of a LBP 14" rally wheel when it has a tire mounted? I mean are there any numbers visible on the rim?
I have a line on some rally's with tires, but the guy has no clue how wide they are.