I haven’t either, I think they are for the 70 model.Ive never seen that style used on any 68-79 Plymouth or Dodge B body cars
1968 Road Runner/GTX 2932209 is a “kit” that was available through the parts department/dealer catalog. Original numbers will be 2856560/561. See if these part numbers are on the guards.Wondering now what those are supposed to fit.