I'm not certain dashes are interchangeable between the different Early As. Just looking at your image, it's clear that your Dart dash is no where near what my Valiants look like. They may share some common dimensions though.
One consideration is anyone's dash is probably gonna have some cutting to fit this design. My idea was to come up with not a design specific to the dart, but one that shared enough common dimensions to work. TBD on if that will be the case or not. I'll need to get my hands on some local cars to find out.