Afternoon project? 1973+ bumper reinforcment removal for weight reduction...worth it?

I’m not sure it would be a direct bolt on for a ‘73, but an alternative if you don’t want to lose the crash protection, is the aluminum pieces that mount the bumpers (backer bars for want of a better term) and plastic filler strips from the ‘76 Feather Duster/Dart Lite.
Of course, finding said bits is probably not going to be the easiest due to the one year only production, and if a donor could be located, the special hood (they had aluminum underbracing) and matching decklid (Duster,Demon,Dart Sport only) from one would likely save another 10-20lbs or so.