Bumper interchange

The physical shape of the bumper should be the same. 74 used the funky shock mounts so it will likely have different mounting holes.

Not necessarily true. The ‘74’s only came with shock mounts from when production started in August of ‘73 until sometime in December of ‘73. After
that, from sometime in December until the end of the ‘74 model year in July ‘74 they had standard mounts again. Some kind of production issue.

But even the non-shock mount ‘74 bumpers were different, the mounting holes on the bumper itself were in a different spot. I’ll see if I can dig up my old posts with pictures of the configuration.

Either way, the holes for the ‘74 bumpers are in a different spot. If you have a non shock mount ‘74 bumper, you can use the ‘74 mounts on your ‘73. If it’s a shock mount you’ll just have to sort out the different mounting holes.