I thought the 70-72 were the same...but I also thought they were a stamped steel part like the 73's so I don't think I will be much help. Sorry for passing on wrong information.

I was told on another site that the 74 bumper guards were bigger than the 73's...also that the rubber piece that extends down to the valence is all one piece in 74 unlike the 2 piece design of 73. Can anyone confirm this?