1971 Dodge Dart with 1970 Dart Bumper

Are there any issues with installing a 1970 Dart bumper on a 1971 Dart Swinger? This bumper, from what I can tell, did not have the bumper guard bolt patterns and appears to be a little more angled on the sides. Any advice would be greatly appreciated.

Here is a pic of the bumper I am considering. Does this look like a 70 Bumper?

Potential.jpg