73 and 74 duster front bumper....the same?

I believe it's "yes & no"! 1973 and 1974 Duster bumpers will interchange as both use standard bumper brackets. However, I believe that they started using the "shock absorber" brackets in '74 on Valiants and Customs! Dusters went to the "shock absorber" brackets in 1975.

The easiest way is to have pice of the carriage bolt pattern on the front to compare what you need to what someone has.