dart swinger fender brackets- interchangability??

I measured the brackets from my '73 Dart Sport, '71 Demon, and '71 Duster. The brackets are all the same, measuring 12" Overall Length. 11" from Bolt Center to Bolt Center (the end at the fender is slotted for adjusting the bottom of the fender in or out)

3/4" Wide at the Slotted Eyelet/End, 1/2" Wide at the other end (frame mount eyelet), and the tube/round portion measures about 7/16"