I'll check to see if I can find some pics, but the bumper for the earlier cars fits much closer to the body. I'm sure it fits as you think your current bumper should. I know when I swapped, I was much happier with the look.
I remember taking a pic of the two bumpers to compare, but don't know if that pic survived. I'll check my old pc to see if I still have it. If I find anything, I'll post it here, but give me a few days to look.
If you do go that route, you'll need to switch to the earlier style mounting brackets. I saw mention of cutting the '73 brackets above, but it's easier to make new ones (just bend some flat stock and drill a few holes).