Is yours a Duster or Valiant/Custom? All '74 Dusters and Dart Sports I've seen, including 2 I have now, have the regular bumper brackets up front only. The Valiants, Customs, Swingers, or whatever the notch-backs were called in '74, have had the shock absorbers.
Only possibility I could think of is if a '74 Duster or Dart Sport was built late in the model year, possibly as late as the summer of '74.
***Just noticed the '74 Duster 4-speed in your sig.
Do you have the build date?***